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KQ Dixie is a 6-Operator FM synthesizer that is modeled on the synthesizer which appeared on the 1980s.

New version 2.4.8
Old version 2.4.7
Release Notes The previous Audio Units are deprecated. This is because they fail validation in Logic Pro and MainStage. I plan to keep them for compatibility, but please attention. This app may work on Apple Silicon Mac although I don't have the new machine yet. Version 2.4.8: Fixed a crash bug. Version 2.4.7: Added support for iPad portrait screen. Fixed the appearance on iPad without a home button. Optimized process. Stop supporting 32bit architecture. Required iOS 10.0 or above. Other fixes.
Author Ryouta Kira
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audiobus, Audio Unit (AU)

VC-1 is a vintage voiced chorus effect capable of delivering many classic chorus sounds but it doesn't stop there.

New price $2.99
Old price $5.99
Author Kai Aras
Type Effect
Effect type Chorus, Flanger, Phaser etc.
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link

Host AUv3 AudioUnit plugins and connect them in schematics using Visual Programming.

New version 1.2.9
Old version 1.2.8
Release Notes UI changes. SideBar has been removed.
Author Jorge Costa
Type Host, Tool
Supports Audio Unit (AU)

Evolver is a performance tool for creating multi-layered evolving sequences of sound.

New price $5.99
Old price $9.99
Author 4Pockets.com
Type Effect
Effect type Other

DigiKeys is an AUv3 compatible MIDI sequencer plugin for AUM or other AUv3 compatible host applications.

New price $5.99
Old price $8.99
Author 4Pockets.com
Type Tool
Supports Audio Unit (AU)

GeoShred is an expressive musical instrument with a multi-touch performance surface, coupled with an advanced physical model of a guitar.

New price $14.99
Old price $24.99
Author Wizdom Music LLC
Type Instrument, Controller
Instrument type Synth
Instrument sounds Guitar
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)

ID700 is a software synthesizer based on the voice architecture of the Buchla 700. Sound generation is achieved primarily via FM synthesis and waveshaping.

New version 1.12.2
Old version 1.12.1
Release Notes - Prevent Preset, Waveshape, and Tuning installations from blocking initial startup
Author Jonathan Schatz
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audio Unit (AU)

TalkWorks is an AUv3 plugin designed to give any sound a human vocal like quality by simulating vowel sounds found in human speech.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Effect
Effect type Vocal effects
Supports Audio Unit (AU)

The Vocal Harmonizer plugin was specifically designed for adding harmonies and basic auto tuning frunctionality to recorded vocal lines. It is specifically tuned to the frequency range of the human voice and tracks the incoming vocal frequency attempting to tune to the desired musical key and mode of your song.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Effect
Effect type Vocal effects
Supports Audio Unit (AU)

MIDI Strummer is an AUv3 plugin designed to simulate guitar strumming and picking techniques. It can used to generate MIDI note data which can be sent to either an external synth of choice or the internal soundfont engine.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Tool
Supports Audio Unit (AU)

NuRack is an AUv3 based multi-channel audio effects processor with a difference, it actually allows you to design your own custom effects using the building blocks provided.

New price $7.99
Old price $12.99
Author 4Pockets.com
Type Effect
Effect type All-in-one
Supports Audio Unit (AU)

GeoShred Play is an expressive musical instrument with a multi-touch performance surface, coupled with an advanced physical model of a guitar.

New price Free
Old price $9.99
Author Wizdom Music LLC
Type Instrument
Instrument type Synth
Instrument sounds Guitar
Supports Inter-App Audio (IAA), Audiobus

Podcasts AU is a podcasts audio unit plugin. The audio stream of podcasts is sent to the plugin output instead of going to speakers.

New price $0.99
Old price $5.99
Author Pham Thang
Type Instrument, Tool
Instrument type Sampler
Instrument sounds Other
Supports Audio Unit (AU)

SnakeBud is a 16-step AUv3 MIDI Sequencer with a 4x4 grid. You can set the note, gate, velocity and probability values for each step and you can also toggle them on/off.

New version 1.5.0
Old version 1.4.1
Release Notes This version improves the AUv3 plugin with sample-accurate timing.
Author Cem Olcay
Type Tool
Supports Audio Unit (AU), Ableton Link

The BandHelper app works with your BandHelper account to share info with your bandmates, streamline your management duties and power your live show.

New version 4.3.6
Old version 4.3.5
Release Notes - Fixed a problem that prevented the pause name and details from appearing when swiping through songs in full-screen display. - Fixed a problem that made the Next/Previous Screen remote control actions stop paging too soon in lyrics that contain markers. - Fixed a problem that sometimes highlighted the wrong song in a smart list. - Restored the automatic sizing of a document to one complete page when displayed full-screen in the same orientation as the device orientation. - Updated song buttons that are stretched to an extreme aspect ratio and placed over the document viewer to use the semi-transparent background of other buttons placed over the document viewer rather than the opaque background of other stretched buttons. - Fixed a problem that made the screen sharing image disappear when rotated 180 degrees. - Updated the chord formatting on an external display to place bracketed chords above the lyrics by default if Settings > General Settings > External Display > Bracketed Chords isn't set. - Stopped the new MIDI Beat Clock code from sending the beat clock to BandHelper's own input ports.
Author Arlo Leach
Type Tool
Supports Inter-App Audio (IAA)

Flux Liquid Audio is a real time multi-effects processor and sequencer.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Effect
Effect type All-in-one
Supports Audio Unit (AU)

Deep Wave is a real-time 2D spectrogram with high quality rendering. A useful tool to inspect audio insights.

New price Free
Old price $5.99
Author Pham Thang
Type Tool
Supports Audio Unit (AU)

SideBand Remix is an AUv3 plugin for final mixing and mastering. It separates the phantom center from sideband (L/R) content which is what give a stereo track its width, and lets you remix it.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Effect
Effect type Equalizer, Filter, Other
Supports Audio Unit (AU)

Chameleon is an AUv3 compatible sampler instrument plugin for your favourite DAW.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Inter-App Audio (IAA), Audio Unit (AU)

Host AUv3 AudioUnit plugins and connect them in schematics using Visual Programming.

New version 1.2.8
Old version 1.2.7
Release Notes Multiple MIDI outputs can now be connected to the same input which is useful for creating polyrhythms. Maximised plugins now leave the NavBar visible with the close button on the right. Audio remains playing after moving to the background. MIDI Processors weren't accepting input messages, it is now possible to record MIDI. Many bug fixes.
Author Jorge Costa
Type Host, Tool
Supports Audio Unit (AU)