CONTROL VOLTAGE IN
The PITCH CV, FILTER CV, and VOL CV inputs each accepts an expression pedal (such as the Moog EP-2) or a control voltage signal from 0 to +5 volts. If you connect an expression pedal to VOL CV, you can use your foot to control the Sub Phatty’s output level. If you connect an expression pedal to FILTER CV, you can sweep the filter cutoff in the same manner. The PITCH CV and FILTER CV inputs are calibrated so that a one-volt change in the control voltage will result in a one-octave change in frequency.
The KB GATE input accepts a +5 volt signal, which causes the Sub Phatty’s envelopes to trigger.
Yes, that's in general, across the A-100 system. However, I doubt the A-155 can send all of those. Usually, a sequencer only sends gate info (0 or +5V) and note info (from 0 to +5V). That's it. But, again, I'm not familiar with the A-155. Check the specific outputs for the A-155. Other modules send other signals, with different voltages, as you point out. In any case, the Sub Phatty can only receive 4 CV's: gate, pitch, volume, and filter cutoff. To use it with a sequencer, just connect it to gate and pitch. I'm pretty sure it should be ok. If you want to affect the volume or the filter cutoff, using other modules, then yes, be careful what voltages you're sending.Maine wrote:The Doepfer manual states these voltages for the whole a-100 ecosystem:
Trigger/gates: +12v
Audio signals: -5v to +5v
Control voltages (e.g. LFO): -2.5v to +2.5v
Control voltages (e.g. ADSR): 0v to +8v
So, bearing in mind that there will be some wonkiness if I send it negative voltages, my only question, which I suspect only Moog can answer, is:
- Will the Sub Phatty be damaged in any way if fed with these voltages?
