This post was accidentally reposted three times because I initially attached a file to this but the file type was invalid and so I edited the file out and resubmitted, thinking that it would only create one post but it created three.

I definitely agree on the panning part, but Zxx is difficult because of the blackbox nature of MIDI messages - for example, if Zxx is configured to send MIDI CCs to a VST plugin, which of them would need to be sent to the plugin? All of them? Only the last one? Does it matter that the messages are suddenly called at the same time? Plus, sending messages to plugins is of course relatively expensive. This makes Zxx state bookkeeping difficult. In general, if you use Zxx for filters only, I'd suggest to try using the filter settings in the instrument properties (default cutoff and resonance values).

oh wow for some reason i didn't realise you could set cutoff values higher than the default value i thought it like scaled from 0 to where you set it (wtf?????) haha okay that works. but yeah, what I said about Xxx and S91 is still valid.

r4901 adds S91/S90 and panning command handling to the seeking code.