Don't touch them, they are calibrated to remove the sampling frequency components Inviato dagli anelli di saturno > On 14 Mar 2015, at 15:46, gordon@... [CZsynth] <CZsynth@yahoogroups.com> wrote: > > On Sat, Mar 14, 2015 at 02:30:38PM +0000, gordon@... [CZsynth] wrote: > > On Sat, Mar 14, 2015 at 07:21:18AM -0700, smw-mail@... [CZsynth] wrote: > > > I would look it up in the service manual before tweaking it. Sometimes those pots are finely tuned. > > > > It's not that fussy. It's just the 17kHz rolloff on the output of the DAC. > > > > You probably won't hurt anything by fiddling with it, but you won't make a hell of a lot of difference to the sound either. If you want an actual LPF like on an analogue synth, you'll need to go outboard :-) > > > > And on that note, if you want to build a simple outboard VCF you could do worse than to build a clone of the Steiner Synthacon filter. Its performance is pretty horrible - it suffers badly from control voltage breakthrough on the output *and* input voltage breakthrough on the control, so its actual cutoff frequency is dependent on the input signal! However, it has an extremely good performance-to-fiddly-bits ratio. > > Here's a prototype clone I made, built "dead bug" style on a bit of scrap PCB > http://gjcp.net/~gordonjcp/filter.jpg > > It sounds like this (be careful! My early version had fairly uncontrollable resonance): > http://gjcp.net/~gordonjcp/filtertest.ogg > > And it has highpass and lowpass *inputs* - not outputs - so you can use it as a sort of frequency-variable crossfader, like this: > http://gjcp.net/~gordonjcp/mp3s/hilow.ogg > > Here's a good writeup: > http://yusynth.net/Modular/EN/STEINERVCF/index-v2.html > > -- > Gordonjcp > >
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Re: [CZsynth] Re: CZ-1 has 2 LPFs inside. What are they? (Picture)
2015-03-14 by Carlo