iOS Musician Apps (567) Supported Technologies is Audio Unit (AU)

This app is a portable multitrack audio and MIDI recording studio featuring virtual instruments, editing with unlimited undo/redo, mixing, real-time effects, automation and much more!

This audio shredder does just what is says, it shreds incoming audio (usually strings or lengthy sustained chords) into bite size pieces, adds an envelope and passes through a filter of choice.

Multieffect Audioprocessor. Seven studio quality effect modules for live usage and to enrich your iTunes music library.

Epic 64-voice Virtual Analog / PCM iPad Synth. Inspired by the Digital Synths of the 80s and 90s.

Express yourself. Create your signature retro piano sound. Simple controls allow you to easily create an emotional vibe for your next hit record.

AudioKit Synth One is a completely free & open-source professional iOS Synthesizer. 

AudioLayer is a full featured open standard audio multi-sampler pushing the boundaries beyond what has been available even in the desktop music production worlds.

Import audio and instantly get a mastered version. Immediately hear a boost in volume and overall sweetening of the mix.

Studio quality reverb for AUv3 / Audiobus / Inter-app audio and songs from your iTunes music library.

You can think of auGEN X in two ways:  first, it is a handy utility for making audio test sounds, and second, it is a performable creative sound design tool.

Auria is a mobile music production system designed from the ground up for the iPad.

Auria is a mobile music production system designed from the ground up for the iPad.

auSCOPE X is the Smart Audio Oscilloscope that lets you see your sound. Its Two Channel Design lets you look at stereo audio waveforms in real time in pixel-accurate resolution.

AUv3 Midi sequence generator which generates musical evolving sequences  that you can further automate or modulate via midi.

AUVideoPlayer is a video player that works as an Audio Unit v3 plugin (AUv3) in your favorite DAW host apps such as AUM, Garageband, Cubasis or Audiobus.

A step sequencer for creating melodic loops, chord progressions, arpeggios, drum grooves and basslines.

Baervaag brings FM synthesis to the masses! An easy to use but still tweakable synthesizer, accessible to everyone.

The multi-band delay BandDelay is a tool for sound design and loop manipulation in realtime. In contrast to common delay processors BandDelay splits the frequency spectrum of the input signal into 27 bands and applies a separate delay unit to each band.