I don’t have a SoftStep.

The OT can change patterns when it receives MIDI Program Change messages. To enable that, enable PROG CH RECEIVE in the OT’s PROJECT > MIDI > SYNC menu. In that menu, note the value of the CHANNEL setting. See pages 42 & 43 of the manual.

The SoftStep can send MIDI Program Change messages. There is a factory preset called “PRGM” that sends such messages on MIDI channel 1. See pages 19 and 70 of the manual.

Unfortunately there is no dedicated MIDI command on the OT for select next or previous pattern, but you can probably create a suitable behaviour in the SoftStep’s advanced editor.

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