in controller mode, OP-1 turns in to a full blown MIDI controller, with access to transport (play/stop, rec, rewind and forward), a two octave keyboard with four endless encoders as well as a sound module that can be controlled from virtually any external software.
record anything you create with the 4-track tape feature. match the tape speed to the sequencer tempo for some really nice overdubbing. change tapespeed while recording, or record backwards in realtime. switch to the 4 channel mixer and add some punch with the built in EQ and compressor.
finally, create a live mix in album mode on a virtual vinyl.
built-in mic and FM radio