iOS Musician Apps (69) Supported Technologies is Audio Unit (AU), Type is Tool

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

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.

ScaleBud is a music theory tool for composers, artists and learners. It has more than 40 most popular scales and counting.

SnakeBud is a 16-step AUv3 MIDI Sequencer with a 4x4 grid. You can set the note, gate, velocity and probability values for each step and you can also toggle them on/off.

RhythmBud is a MIDI effect application that would transform incoming MIDI messages into the rhythmic pattern you will create on its editor.

StepBud is a MIDI Sequencer with Audio Unit AUv3 plugin, Audiobus and Ableton Link.

"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.

Get audio visuals with your AUv3 host or the standalone app. Scope uses a two-axis graph to give a visual representation of a waveform over time, with the horizontal axis representing time and the vertical axis representing the amplitude.

MidiMixer is an AUv3 plugin specifically designed for AUM which allows you to control your mix and record automation synced to AUM's timeline.

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

This is an AUv3 compatible Multi-Track Recorder plugin specifically designed for AUM and other DAW's that don't support audio recording capabilities.

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.

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

cykle is an innovative, semi-generative melodic step sequencer for iOS that is based around the concept of sequencing individual musical parameters (such as pitch, velocity, length, transposition, etc.) independently, by way of decoupled sequencer lanes.

ToneBoosters Spectrogram shows a real-time spectrogram of the incoming audio signal. The ToneBoosters Spectrogram app captures the microphone input and processes the signals in real time.

"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.

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

DigiKeys is an AUv3 compatible MIDI sequencer plugin for AUM or other AUv3 compatible host applications.

So what is a midi echo? It is similar to the audio echo effect where copies of the original audio are repeated at regular time intervals but with some form of change (e.g. quieter). But unlike audio, midi is digital in nature (low resolution 8 bit mostly) and focused around the midi note on & off message used to control synths etc.

Polythemus AUv3 Midi was created for five main uses: сreating a polyphonic synth from individual monophonic synths, stacking different or similar synths that play alternatively for variation, interesting variations in timbre & rhythms by having multiple synths driven with a sequencer (e.g. Quantum) or arpeggiator, work outside IOS on hardware synths, voice allocation of externally hosted software vst(e.g. Logic or Ableton Live) using mac osx IDAM for direct device to mac midi.