iOS Musician Apps (319) Supported Technologies is Inter-App Audio (IAA), Type is Instrument

With this instrument you can transform any sound into a playable musical instrument via a technique known as Granular Synthesis.

Navichord is a modern MIDI controller, working with software and hardware synths.

Annoydio has a grid of pads which you can assign, manipulate, and play sounds.

Annoydio jr has a grid of pads which you can assign, manipulate, and play sounds.

iSEM is a recreation of the classic 1974 Oberheim SEM (Synthesizer Expander Module), one of the world's first self-contained synthesizer modules and the first to bear the "Oberheim Electronics" name.

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

Explore unreal synthesis with the most unique performance control on iOS! TC-Performer presents a multi-touch performance environment unlike any other synthesizer.

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

Triqtraq LE is a free limited edition of the critically acclaimed music app Triqtraq - Jam Sequencer.

S-Modular is a semi modular synthesizer for your iPad.

Samplist is a MIDI Sampler Instrument which allows you to easily chop a sample into different slices.

Designed by a musician for musicians Drums by Asrodot brings a novel twist to drumming on the iPad/iPhone.

The concert quality piano app.

The concert quality piano app.

Turn your iPad into the electric piano instrument with a collection of authentic electric pianos and vintage keyboards along with built-in recording.

Relax and instantly create you own meditation music. A great way to explore relaxing vibrations with this spiritually charged music.

Compose original beats in the smooth one-window interface, record sound tweaks in realtime and sample your own sounds for direct use.

Englitina is an authentic-sounding English Treble Concertina for the iPad.

This is a Lite version of EGDR909 - 909 Drum Machine, but all its functionalities can be unlocked as in-app purchase.