It includes a USB64 MidiBlock from Doepfer. The Knobs handles only the "Current" Oscillator. With the buttons you choose OSC 1 to 3 and set it to the Current Oscillator. It has also buttons for record, play and delete files, open and close Panels. With the Movement Knob in the Middle you can move the in and out markers for the Recorded Sound, to cut or trim it.
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