Hi folks -

So I'm finally making some progress getting this Polaris back up and on its feet. This one last issue has me stumped, tho'.

On one voice only (#2 of the 6), the mod routings accessed via the Assignable Control (Osc 2 Vibrato, Osc 2 Env, Detune) aren't working right. Pulling the control positive for Osc 2 Env creates this strange band-modulated sort of thing as the oscillator sweeps down, then pulling the slider negative, instead of creating a rising pitch like the other oscillators, starts with silence and fades in. Detune doesn't do anything at all, and Vibrato creates some sort of waveform that's different from the other 5 oscillators and just plain wrong. By itself - unmodulated - the oscillator runs and tracks just fine.

Again, this behavior is only on one voice - the other 5 are fine.

The oscillator seems to pass the Autotune routine - at least, the Tune light blinks 6 times.

Using a shotgun approach, I've tried individually swapping out the two 4051's on that voice, the LF347 for Pitch B, and the 3374 itself. No change for any of it.

Any thoughts?

Thanks,
Eric