iOS Musician Apps (64) Supported Technologies is Audio Unit (AU), Type is Tool

The WoodStepper is a sequencer having both audio and midi out.

MIDI Tools is a suite of AUv3 MIDI audio units for iOS that lets you manipulate the MIDI messages inside your DAW’s effects chain, creating complex or otherwise impossible MIDI routings or effects.

MIDI Tape Recorder is an open source Audio Unit v3 plugin with a radically different approach towards MIDI recording.

MusiKraken is an Experimental MIDI Controller Construction Kit. Make music using your hands, face, voice or by rotating the device!

Physicles is a container of physics-based Audio Unit MIDI plugins. These AU MIDI plugins generate MIDI messages through the use of an underlying physics engine, which models the physical interactions between various entities.

7Xwave - a 7 track sample sequencer with synthesizer & animatable modulation features.

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

This application is simply a container for the Audio Unit and also serves as the documentation for the AU. PhaseDelayArray is a bit of a strange effect. O.K, so, what is it? PhaseDelayArray has three effect units chained together in an interesting configuration, and one of these units is just a little bit twisted.

Harmonizr is a vocal harmonizer offering a unique and fun user interface.

Dadachron is a standalone 12 track MIDI Step Sequencer to control all 12 outputs of your dada machines automat controller. Simply plug in your iPad to the automat via USB MIDI and start triggering notes, it works plug and play.

"QuantiChord" is a MIDI effect that generates chords from incoming notes and quantizes the results to a pre-defined scale. It can be used as a standalone application or as an Audio Unit MIDI effect plug-in.

"StepPolyArp Unit" is a real-time polyphonic and polyrhythmic MIDI step arpeggiator and step sequencer. It can be used as a standalone application or an Audio Unit MIDI effect plug-in.

MIDISpy - MIDI Monitor. A handy little utility for monitoring MIDI connectivity.

Metronomics is not only a metronome, but a tool designed to help build a solid sense of time and rhythmic security.  It's a new kind of metronome -- use Metronomics to generate random patterns, sequenced grooves, or a combination of both to help you practice with more than just your typical click track.

Poly 2 is a generative sequencer that creates evolving patterns and melodies based on the power of polyrhythms.

Wavescope is an Audio Unit Plugin effect that visualizes your audio in real-time.