About OPL AUv3 FM Synth
The Yamaha OPL chips, introduced in 1985, shaped the sound of 80s and 90s video game soundtracks. discoDSP OPL emulates their FM and additive synthesis, including the distinctive percussion mode, and extends it to...
The Yamaha OPL chips, introduced in 1985, shaped the sound of 80s and 90s video game soundtracks. discoDSP OPL emulates their FM and additive synthesis, including the distinctive percussion mode, and extends it to four-operator FM on a pool of eight OPL3 chips. With up to 16x oversampling for crystal-clear sound and over 11,000 included instruments, discoDSP OPL is ideal for classic game soundtracks, electronic music, or crafting unique sounds. Play it with the built-in on-screen keyboard on iPad, a MIDI controller, or your DAW. On iPhone, connect a MIDI keyboard or run it as a plugin. CORE FEATURES . Eight-chip YMF262 (OPL3) voice pool with all eight waveforms per operator. . Up to four modulators and four carriers per note, with eight algorithms and a routing chart. . Percussion mode with bass drum, snare, tom, cymbal, and hi-hat. . Over 11,000 instruments: SBI categories, 4-op and OPL3 banks, game GM sets, and TX81Z voices. . Loads WOPL, WOPLX, OPLI, and TX81Z/DX sysex banks as well as SBI. . Oversampling from 1x to 16x, with a separate bounce setting. . Key-tracking stereo panning that places notes across the field by pitch. . AN1x-style unison with 32-step detune and stereo spread. . Master volume with Valve and Tape saturation. . MPE support with pressure and slide routable to synth parameters. . Sustain pedal and sample-accurate MIDI. . On-screen keyboard with pitch and modulation wheels (iPad, standalone). . Analog modeled wave shaper on the carrier. . SBI and SBIX instrument import and export through the Files app. . Bluetooth MIDI device discovery. . AUv3 plugin for GarageBand, AUM, Cubasis, BeatMaker, and Drambo. THE OPL SOUND Two-operator FM is the sound of Adlib and Sound Blaster era games. Each voice pairs a modulator and a carrier, each with its own waveform, frequency multiplier, envelope, and attenuation. Route them in FM for the metallic, bell-like timbres the chip is known for, or in additive to stack the two operators as independent tones. Feedback on the modulator pushes the tone from clean to gritty, and all eight OPL3 waveforms are available on every operator: sine, half sine, absolute sine, quarter sine, alternating sine, camel sine, square, and logarithmic sawtooth. They are the chip's own, not approximations. MULTI-OPERATOR MODE Add operators with the + and - buttons, up to four modulators and four carriers per note. Pick one of eight algorithms or draw your own on the Yamaha-style routing chart. Each patch is compiled onto the chip's 2-op and 4-op channels, and a pool of eight OPL3 chips keeps the polyphony up with larger patches and unison. PERCUSSION MODE The rhythm section repurposes the last channels into five dedicated drum voices: bass drum, snare, tom, cymbal, and hi-hat. It is how the chip made drums without samples, and it is included here in full. INSTRUMENTS Over 11,000 instruments are included. SBI sounds are sorted by category, the 4-OP and OPL3 folders hold four-operator game banks, Game GM collects General MIDI sets from classic PC games, and TX81Z holds Yamaha four-operator voices. Load one from the menu, step through them with the previous and next buttons, or import your own SBI, WOPL, WOPLX, OPLI, or TX81Z sysex files from the Files app. Anything you edit can be exported back out as SBI, or as SBIX for multi-operator patches. OVERSAMPLING The chip is emulated at up to 16 times the host sample rate, which stops the FM sidebands folding back into the audio band as aliasing. Playback and offline bounces have separate settings. ON-SCREEN KEYBOARD The standalone app on iPad includes a keyboard with pitch and modulation wheels, so you can play without any external hardware. The mod wheel drives a vibrato LFO with continuous depth, beyond the chip's fixed two-position vibrato. STANDALONE OR AUV3 Load OPL in any AUv3 host with settings saved in your project, or run it standalone with a MIDI controller, Bluetooth MIDI, or the on-screen keyboard.
Previous Versions
Here you can find the changelog of OPL AUv3 FM Synth since it was posted on our website on 2021-11-30 17:50:53.
The latest version is 3.2.3 and it was updated on 2026-10-17 04:40:52. See below the changes in each version.
OPL AUv3 FM Synth version 3.2.3
Updated At: 2026-10-14
Changes: Version History Fixed the Attenuation slider always setting 0 dB and not showing the stored value.
Velocity Sensitivity is now off on the default patch, so Attenuation sets the operator level as in 2.x. 3.2.3 6d ago New Play Mode menu with Poly, Mono and Legato, saved with each session.
Mono restarts the envelope on every note. Legato changes pitch without restarting it while keys overlap.
Releasing a key returns to the newest key still held.
The active mode shows next to the saturator.
Stolen voices now restart their envelope instead of continuing the previous note.
Fixed Attenuation having no effect on the default patch. Velocity Sensitivity is now off by default, as in 2.x. 3.2.2 Oct 3 Multi-operator mode: up to four modulators and four carriers per note, compiled onto 2-op and 4-op OPL3 channels.
Eight algorithms plus Custom, edited on a Yamaha-style routing chart.
Voice pool of eight OPL3 chips, so larger patches and unison keep their polyphony.
Over 9,000 new instruments in the 4-OP, OPL3, Game GM and TX81Z folders.
WOPL, WOPLX, OPLI and TX81Z/DX sysex banks load directly from the Files app.
New .sbix format for multi-operator instruments.
Velocity Curve parameter with a Relative setting for bank sounds.
Master Volume with an output level meter.
Saturator with Valve and Tape voicings that shape only the peaks.
Sustain pedal and sample-accurate MIDI timing.
Dragged values now show on the column label, so your finger does not cover them.
Lower CPU use: silent chips and channels are skipped.
Fixed stuck notes when the transport restarts, Percussion Mode changes or MPE is switched. 3.2 Sep 25 Added iOS 27 compatibility. 3.1.1 Sep 17 A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.2.2
Updated At: 2026-10-06
Changes: Version History New Play Mode menu with Poly, Mono and Legato, saved with each session.
Mono restarts the envelope on every note. Legato changes pitch without restarting it while keys overlap.
Releasing a key returns to the newest key still held.
The active mode shows next to the saturator.
Stolen voices now restart their envelope instead of continuing the previous note.
Fixed Attenuation having no effect on the default patch. Velocity Sensitivity is now off by default, as in 2.x. 3.2.2 2d ago Multi-operator mode: up to four modulators and four carriers per note, compiled onto 2-op and 4-op OPL3 channels.
Eight algorithms plus Custom, edited on a Yamaha-style routing chart.
Voice pool of eight OPL3 chips, so larger patches and unison keep their polyphony.
Over 9,000 new instruments in the 4-OP, OPL3, Game GM and TX81Z folders.
WOPL, WOPLX, OPLI and TX81Z/DX sysex banks load directly from the Files app.
New .sbix format for multi-operator instruments.
Velocity Curve parameter with a Relative setting for bank sounds.
Master Volume with an output level meter.
Saturator with Valve and Tape voicings that shape only the peaks.
Sustain pedal and sample-accurate MIDI timing.
Dragged values now show on the column label, so your finger does not cover them.
Lower CPU use: silent chips and channels are skipped.
Fixed stuck notes when the transport restarts, Percussion Mode changes or MPE is switched. 3.2 Sep 25 Added iOS 27 compatibility. 3.1.1 Sep 17 A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.2
Updated At: 2026-10-03
Changes: Version History Multi-operator mode: up to four modulators and four carriers per note, compiled onto 2-op and 4-op OPL3 channels.
Eight algorithms plus Custom, edited on a Yamaha-style routing chart.
Voice pool of eight OPL3 chips, so larger patches and unison keep their polyphony.
Over 9,000 new instruments in the 4-OP, OPL3, Game GM and TX81Z folders.
WOPL, WOPLX, OPLI and TX81Z/DX sysex banks load directly from the Files app.
New .sbix format for multi-operator instruments.
Velocity Curve parameter with a Relative setting for bank sounds.
Master Volume with an output level meter.
Saturator with Valve and Tape voicings that shape only the peaks.
Sustain pedal and sample-accurate MIDI timing.
Dragged values now show on the column label, so your finger does not cover them.
Lower CPU use: silent chips and channels are skipped.
Fixed stuck notes when the transport restarts, Percussion Mode changes or MPE is switched. 3.2 Sep 25 Added iOS 27 compatibility. 3.1.1 Sep 17 A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.2
Updated At: 2026-09-26
Changes: Version History Multi-operator mode: up to four modulators and four carriers per note, compiled onto 2-op and 4-op OPL3 channels.
Eight algorithms plus Custom, edited on a Yamaha-style routing chart.
Voice pool of eight OPL3 chips, so larger patches and unison keep their polyphony.
Over 9,000 new instruments in the 4-OP, OPL3, Game GM and TX81Z folders.
WOPL, WOPLX, OPLI and TX81Z/DX sysex banks load directly from the Files app.
New .sbix format for multi-operator instruments.
Velocity Curve parameter with a Relative setting for bank sounds.
Master Volume with an output level meter.
Saturator with Valve and Tape voicings that shape only the peaks.
Sustain pedal and sample-accurate MIDI timing.
Dragged values now show on the column label, so your finger does not cover them.
Lower CPU use: silent chips and channels are skipped.
Fixed stuck notes when the transport restarts, Percussion Mode changes or MPE is switched. 3.2 6h ago Added iOS 27 compatibility. 3.1.1 Sep 17 A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.1.1
Updated At: 2026-09-19
Changes: Version History Added iOS 27 compatibility. 3.1.1 1d ago A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.1
Updated At: 2026-09-12
Changes: Version History A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 Sep 1 Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.1
Updated At: 2026-09-05
Changes: Version History A new unison mode stacks five detuned layers per note, following the Yamaha AN1x voicing with a 32-step detune depth. Levels are compensated at every depth, and sounding notes retune live as you slide the control.
With unison on, the panning control becomes an AN1x-style stereo spread. The chip now renders in true stereo, layers route centre, left, and right, and the width blends from an exact mono mix to the chip's full separation.
The standalone app now keeps its state across restarts, so a force-closed app reopens where you left it. 3.1 3d ago Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 3.0.1
Updated At: 2026-08-24
Changes: Version History Fixed instruments missing on new installs. The factory sound banks are now copied into the shared folder on first run, so the app and the AUv3 plugin both see them. 3.0.1 Aug 8 PL has been rewritten from the ground up.
NEW FM ENGINE
The synthesis core is now built on the YMF262 (OPL3), replacing the previous OPL2 emulation. All eight OPL3 waveforms are available on every operator, where before there were four. The synthesis core, register layer, parameter handling, and interface have all been rewritten.
SOUND QUALITY
Oversampling up to 16x is now applied to the chip itself, cutting the aliasing FM produces at high modulation settings. Pitch, envelope timing, and key scaling stay constant across every oversampling setting. Playback and bounce have separate settings, and offline renders use a linear-phase filter and report their latency, so a bounce matches what you monitored.
NEW INTERFACE
Redrawn as resolution-independent vector graphics in place of the fixed-size bitmaps, and freely resizable with a zoom menu. Voice activity is now shown live on the envelope displays.
NEW PARAMETER
Panning: a key-tracking stereo spread that places notes across the field by pitch.
ON-SCREEN KEYBOARD
The iPad standalone app now has a MIDI keyboard, so OPL no longer needs an external controller to play. It sits below the panel with pitch and modulation wheels and octave buttons at each end. The modulation wheel drives a vibrato LFO with continuous depth, going well beyond the chip's own fixed two-position vibrato. Toggle it from Menu > Show MIDI Keyboard.
ON iOS
Oversampling settings are now available, with playback and bounce quality each set from 1x to 16x and remembered between sessions. Loading and exporting SBI instruments through the Files app and iCloud Drive has been fixed, and the AUv3 no longer opens at the wrong size in hosts.
COMPATIBILITY
Existing projects and presets load unchanged, with automation assignments preserved. Adds a new Init Bass factory program.
FM synthesis now uses ymfm by Aaron Giles under the BSD 3-Clause License. 3.0 Aug 6 Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 2.7.2
Updated At: 2026-08-04
Changes: Version History Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment. 2.7.2 Mar 6 Oversampling switched to 8x for better CPU performance and similar sound quality.
New menu button adds Export button with Load/Export options.
Modern popup menus with improved styling.
Per-project window size memory.
Reduced CPU usage during parameter automation and GUI processing.
Smart processing only affects active channels.
Optimized voice management eliminates audio dropouts.
Enhanced oversampling initialization and memory management.
Improved plugin state management and build system updates.
Major framework update. 2.7 08/13/2025 16x oversampling for pristine, alias-free sound.
Optimized voice management for enhanced efficiency and performance.
Updated interface with modern elements for a smoother user experience.
Significant core framework improvements for greater stability and performance.
Fixed crash issue when triggering more than 9 voices simultaneously. 2.4 08/14/2024 iOS 16 compatibility.
Framework update.
Touch friendly popup menus. 2.2 12/02/2022 iOS 15 compatibility.
Framework update.
Inter-App Audio compatibility. 2.1 09/24/2021 Fixed Modulator waveform 5 unable to be selected.
Fixed 12x or 15x Frequency multiplier on both modulator and carrier unable to be selected.
Fixed Keyscale attenuation order. Now -0, -3, -1.5, -6. 2.0 12/17/2020 AUv3 parameter exposure for host automation.
iOS Universal build with iPhone support.
Enhanced AUv3 GUI window display fit.
AUv3 GUI scrolling using left and right border sides. 1.8 09/15/2020 Preset name now displays in Load button.
Active folder and preset is displayed with a tick on the Load drop down menu.
Relocated - + preset navigation buttons. 1.7 06/23/2020 Fixed FM and Additive icon graphic locations. 1.6 06/07/2020 Fixed AUv3 issue with combo box values not being displayed. 1.5 06/07/2020 1.4 06/04/2020
OPL AUv3 FM Synth version 2.7.2
Updated At: 2026-03-06
Changes: Added App Data Group shared container between Standalone and AUv3 builds.
Added Bluetooth MIDI device discovery dialog to settings menu.
Added iTunes File Sharing support for SBI instruments.
Added Carrier analog modeled wave shaper parameter.
Fixed Carrier Multiplier label alignment.
