Forget the matrix, just draw your sound!
Dazibao exists for iOS and MacOS.
Dazibao MacOS includes a keyboard tuner : you can tune freely your MIDI keyboard with.
It includes also an internal recorder (there is not any AU plug-in anymore). Record your playing (while your host sequencer is running if needed) and drag and drop your audio file to the host.
Dazibao iOS includes a drums and bass line (analog style). This version allows to create sessions (several patches for Dazibao + several rhythms with the drums and bass line) for concerts : play Dazibao live!
Patches can be shared between the two versions via iTunes (patches only, files « .dazbao »).