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

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.

Bark Filter is a Critical Band Analyser/Filter/Compressor.

Up to eight pitch shifted voices are created from vocal input or instruments.

VoxSyn turns your voice into the flexible vocal sound generator ever.

For all creatures in the ocean of sound - Sonic textures from other worlds, Analog signature sounds,  Cut-through-the-mix leads and silkily smooth pads.

Cube Synth is a groundbreaking new software instrument giving you the power and flexibility of additive synthesis together with easy editing and morphing capabilities.

Back in the “old days”, producers and engineers created delay and echo effects using tape machines. Tap Delay combines the warm sound of vintage tape echo machines with a modern, step sequencer-like tapped delay engine which continues the tradition of the tape echo machines into the 21st century.

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

The unique dynamic wavetable synthesis allows you to explore an unprecedented wide range of sonic territory.

The hybrid synthesis algorithm on which Addictive Pro is based provides you with efficient means for easy control of complex sounds far beyond usual sound synthesis methods.

Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or the touch of your fingers.

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

Tera Synth is a Modular Analog Synthesizer.

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

BandShift is a realtimemulti-band auditory filter and frequency shifter.

PolyHarp is a virtual musical instrument and a thought experiment. It's a testbed for harmonic theory as well as a great multi touch simulator of the good old "idiot zither" you have in the attic.

Droneo is a synthesizer which drones with various timbres and precise intonations that blur the distinction between tones, timbres and chords. Its drone is great for meditation, centering, and calming,  walking and biking, but also can be set up for discordant noise and insect-like buzzing and chirping.

Vox Unit is a vocoder. You speak in the microphone, you play on the keyboard, and choir and vocal effects are produced.

TouchOSC is a modular OSC and MIDI control surface for iPhone, iPod Touch and iPad by hexler.

BAND BOY will absolutely help you practice instruments in lots of ways.