I just cannot figure that out myself and didn’t find any info. My hypothesis is that if Octatrack could manipulate Bitstream’s faders via audio-cc out midi messages (which are available via OT scenes), then maybe setting group chains in Bitstream could somehow fill the shortage of the MIDI scenes functionality of the Octatrack. But I cannot figure out if Bitstream can receive external MIDI CC#s and allow them to virtually twist its own faders.