Mapping Discussion

[XORadmin]

It appears Trig/CV expanders cannot be selected as source in Mappings? I was hoping to map gate on/off sequenced in Trig16 track to mute/unmute a different track. This works fine with Trig out 1-6, but not available from expanders?

No, because the expanders are generating the values themselves and there is no feedback to the NerdSEQ.
To directly answer that question: monitoring 16x4 possible additional values at a usable speed is technically not possible.