hello!

can anyone here help me explain the bit system for ring mod and sync,
and channel off. i've made it work somehow, made some ringmod and
sync sounds, but i have no idea how i did it, and it didn't work the
way i thought it would.

I know that the triangle waveform of channel X can be
ringmodded/synced by the previous channel. (Channel 2 by 1, channel 3
by 2 and channel 1 by 3).

I also know that typically you turn off the modulating channel, so
not to hear it.

So here is my theory: A clean triangle sound on channel 1, playing a
single C3. On channel 3, another clean sound, saw for example,
starting at C4 but with falling pitch. (Using command 280 for
example). This shall modulate channel 1 (and make a typical sync
sound, just to learn it)

Now, according to the manual, E81 should turn on sync for channel 1..
but it doesn't? I think E85 or E86 made something that sounded like
sync. Or ring mod. (I'm not in the studio) Can someone explain the
bit system of the E8X command? And what is the Test and Gate bit?

Also, how do i correctly use the E9X command in this situation?
Typically i'd like to use a filter on the synced/ringmod channel, so
this would be the filter-using channel. I think bad things happened
to the filter when I turned different E9X commands on channel 3.

If someone could shed some light on this i'd be very happy, i love
ringmod and sync, especially the sid's, and a tracker is just
fantastic for programming it more complex and rythmic than the
limited envelopes or LFOs of synths.