iOS Musician Apps (503) Supported Technologies is Inter-App Audio (IAA)

A 4-band parametric stereo equalizer for everything between subtle frequency enhancements and agressive boosting/cutting or special resonator effects.

A stereo delay audio effect, suitable for everything from clean digital delays to filthy dub echoes, flangers and broken cassette tapes.

A sound file manager with powerful import and export abilities.

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

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

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.

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

Free iPad instrument featuring the classic sounds of famous 80s FM Synthesizers.

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

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

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!

Attack Drums is a synthesizer designed mainly for drum sounds, but the powerful sound engine can also be used for everything else - including vocals.

Ignite the Saturn 5 rocket and communicate between capsule and Houston while your voice is transformed live into a real Apollo astronaut.

iSpark is an all-inclusive beat-making solution allowing to create rich tracks from A to Z while experiencing an unequaled workflow.

Arpeggist is a MIDI Note arpeggiator with a very flexible step matrix editor for programming and a unique “rolling dice” random arpeggio generator.

A matrix-controlled arpeggiator designed to play with your thumbs.

ArpBud 2 is a MIDI Arpeggiator app where you can create unique arp patterns and be able to arpeggiate your favorite software or hardware synthesizers.

Arctic Pro Synthesizer / Vocoder is a modern subtractive synthesizer.

Apollo Sound Injector makes it easy to stream audio from one iOS device to another.

apeMatrix is a unique AU/IAA routing tool that gives you total control over what you want to do and how you want to do it.