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The music theory reference tool for musicians of all skill levels. Tonality allows you to view and listen to a large database of piano chords and scales and features a chord-recognition tool that can identify chords you play on your instrument.

New version 8.6.1
Old version 8.6
Release Notes Chord Pads: + Ability to change the output MIDI channel Guitar: + Added all fourths tuning - Shorten display names for new instruments so they fit better on very small screens
Author Bryce Hostetler
Type Tool
Supports Audio Unit (AU)

BLEASS Flanger is a flanging effect offering a wide range of synchronised modulations which colours sound in a novel and unique way thanks to its complex algorithmic combinations.

New price $4.99
Old price $7.99
Author BLEASS
Type Effect
Effect type Chorus, Flanger, Phaser etc.
Supports Audiobus, Audio Unit (AU)

ToneBoosters Spectrogram shows a real-time spectrogram of the incoming audio signal. The ToneBoosters Spectrogram app captures the microphone input and processes the signals in real time.

New price Free
Old price $0.99
Author ToneBoosters
Type Tool
Supports Inter-App Audio (IAA), Audio Unit (AU)

Bassist friends whether you are a slapman, grooman, funkman or just a beginner, this amp is made for you.

Author Julien Faure
Type Effect
Effect type Bass effects
Supports Audio Unit (AU)

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

New price $6.99
Old price $8.99
Author 4Pockets.com
Type Tool
Supports Audio Unit (AU)

Loop Find is a Groovebox-like sampler tool, that also lets you sequence songs. Tap and slide to record beats, melodies, and sample automation.

New version 2.4.1
Old version 2.4
Release Notes - [Update] Update for Audiobus.
Author James Navarro
Type Instrument
Instrument type Sampler
Supports Audio Unit (AU)

If you’re not patient enough to ride audio level manually, this AUv3 plugin saves you a lot of time.

New price $5.99
Old price $7.99
Author Pham Thang
Type Effect
Effect type Compressor, Limiter, Gate, Other
Supports Audio Unit (AU)

AudioStretch is the audio and video transcription tool. Now you can manipulate the pitch, speed and transcribe your tunes from both audio and video files; or by using your phone’s camera you can capture video directly into AudioStretch and transcribe it.

New version 6.6.1
Old version 6.6.0
Release Notes Stability improvements and bug fixes. See something wrong? Send your feedback to support@audiostretch.com
Author Cognosonic Pte Ltd
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Audiobus

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)

Expand your musical horizon by playing Arabic, Armenian, Balkan, Greek, Klezmer, Persian & Turkish sounds, scales and rhythms.

New version 4.07
Old version 4.06
Release Notes We squashed some bugs in this version along with: - UI Update
Author TAQS.IM
Type Instrument
Instrument type Sampler
Instrument sounds Ethnic
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)

AudioStretch is the audio and video transcription tool. Now you can manipulate the pitch, speed and transcribe your tunes from both audio and video files; or by using your phone’s camera you can capture video directly into AudioStretch and transcribe it.

New version 6.6.1
Old version 6.6.0
Release Notes Stability improvements and bug fixes. See something wrong? Send your feedback to support@audiostretch.com
Author Cognosonic Pte Ltd
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Audiobus

Funk Drummer is the grooviest drum machine with the ability to improvise like a human drummer.

New version 4.13
Old version 4.12
Release Notes - Controls MIDI Mapping - Small Improvements - Updated Libraries - Fixed Bugs
Author Lumbeat
Type Instrument
Instrument type Sampler
Instrument sounds Drums, Percussion
Supports Inter-App Audio (IAA), Ableton Link

Waverley is the principal instrument in the moodunits collection. It’s sample-based, but it isn’t a fully-fledged sampling app that allows you to load and edit your own samples. Another usage scenario for Waverley is if you’re just sketching out an idea, perhaps on a less-capable device like your iPhone while you’re on the move.

New version 1.5.5
Old version 1.5.4
Release Notes • Waverley fine tuning range extended to +/- 50 cents • Added Waverley transpose +/- 12 semitones • Added Waverley tuning "drift" - like a super slow vibrato • Fixed issue where Waverley view wouldn't resize in some AU hosts
Author Rob Jackson
Type Instrument
Instrument type Sampler
Instrument sounds All-in-one
Supports Audio Unit (AU)

This is a very simple yet powerful iOS app that performs as a polyphonic audio synthesizer.

New version 2.18.3
Old version 2.17.8
Release Notes New user-requested feature: SF2 tagging and filtering. You can now tag SF2 files and only show those with a given tag. Tagging is done via the font info editor (swipe-right on a font entry to show "pencil" button, then touch to show). The editor now has a tags field. Touch the "Edit Tags" button to reveal a list of user-created tags. Select a tag to associate it with a font, or create a new tag via the "+" button. A new "tags" button on the info bar reveals all known tags. Selecting a tag will only show those font files that have that tag. Allow global tuning adjustments. Supports +/- 2400 cents, or +/- 2 octaves. Allows input in cents or as a the frequency for A4 note. Two predefined settings: standard tuning (440 Hz) and scientific / Verdi tuning (430.54 Hz). Reworked the font info form to show additional information found in an SF2 file: author, copyright, and comment.
Author Brad Howes
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)

SquareSynth is a hybrid analog/8bit style synthesizer. It takes features from the NES console, and the Commodore 64 personal computer.

New version 1.2.3
Old version 1.2.2
Release Notes - [Fix] Update for Audiobus.
Author James Navarro
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audiobus, Audio Unit (AU)

FRMS is a versatile hybrid synthesizer that combines Granular, FM, Subtractive and Additive synthesis using a flexible layering system.

New version 1.2.1
Old version 1.2.0
Release Notes - Add the ability to choose the input channel on the built in recorder - Add the ability to delete an imported bank - Fixes mono/legato bug - Fixes to patch save dialog when saving a patch on a imported bank - Fixes a bug where Bluetooth devices couldnt be used for output using the standalone - Fixes bank import
Author Imaginando Lda
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Ableton Link

djay transforms your iOS device into a full-featured DJ and music production system.

New version 3.6.1
Old version 3.6
Release Notes Thank you for using djay! We update the app regularly to provide the best mixing experience for you. Here is what’s new in this release: • Added support for VoiceOver accessibility when using Gesture Control • Fixed error when accessing SoundCloud playlists in the "Following" section • Various bugfixes and improvements If you enjoy the app please support us by rating it on the App Store. We look forward to your feedback!
Author algoriddim GmbH
Type Instrument
Instrument type Sampler
Instrument sounds DJ
Supports Ableton Link

Soft Drummer is the closest thing to a pro session subtle drummer in your pocket.

New version 3.13
Old version 3.12
Release Notes - Controls MIDI Mapping - Small Improvements - Updated Libraries - Fixed Bugs
Author Lumbeat
Type Instrument
Instrument type Sampler
Instrument sounds Drums, Percussion
Supports Ableton Link

WorshipSong Band is a free cross-platform multitrack player system offering support for up to 16 audio tracks, built-in pads and ambient loops, metronome, and cues, integrated chord charts, lyrics with video backgrounds, foot pedal control, looping, key changes, networking between devices and laptops, and more.

New version 7.0.7
Old version 7.0.5
Release Notes Added pads to library list to enable team and file sharing functions for pads Fix for capo function in network mode Fix for bug in network chord display mode
Author Mark Snyder
Type Instrument, Tool
Instrument type Sampler
Instrument sounds Other
Supports Ableton Link

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)