I’m having some issues with volume control using either SwinSIDs or 8580s in my sammichSID. When attempting to control the volume from the CNFG page by reducing the value from 127, nothing happens until I get to about 8 and then it just turns off. No gradual change in volume, just on or off.
When setting an LFO to modulate the volume in the mod maxtrix, I only get a rhythmic thumping in time with the rate of the LFO. The volume will cut out at the peaks of the waveform but there is no gradual change in volume. This is with any waveform.
I can can lower the volume of a patch by lowering the sustain level, but that isn’t a good solution for sound design.
Anywhere I should be looking for cold solder joints or bad connections? I figure it must be somewhere between the PIC and the SID, but there doesn’t seem to be any documentation on that.