Playing with a living VCO, have a couple of questions.

phdinfunk · Joined: Jun 04, 2008 Posts: 119 Location: Taiwan

Q1: What value would one change c3 to in order to switch in an LFO mode? (Or I could just switch a parallel cap in there). I want to be able to use my osc 3 as an LFO sometimes.

Q2: I'm trying to do this without multiturn pots. So, I'm thinking it might be nice to be able to scale the FREQ_1 pot for a less-wide sweep range. What value trimmer would be good in series with R5 to scale to something like a 3 octave sweep? (I'm using +/-12V). I would like to scale it for center, tune, left -1 oct / right +1 oct.

Q3: I've read a lot of people having issues with PWM and initial pulse width. Should I just install a trimmer in series with R39 to deal with this?

Thanks!