Search found 58 matches

by patrickvf
Fri Nov 29, 2013 4:21 pm
Forum: PAiA Jabber
Topic: 3 topics in 1 - 2720 VCA , 4730 VCF & 4740 ADSR
Replies: 2
Views: 12587

3 topics in 1 - 2720 VCA , 4730 VCF & 4740 ADSR

1. VCA: The output is very low when fully cranked up. I have to use the inverter/buffer to get a decent volume out of it. 2. VCF There is a good amount of noise/hiss coming out of the filter, even when nothing is patched through it. 3. ADSR: The EG amount knob is funky, but I know how to fix that. T...
by patrickvf
Thu Nov 28, 2013 12:34 am
Forum: PAiA Jabber
Topic: Question about 4780 sequencer
Replies: 4
Views: 15760

Re: Question about 4780 sequencer

Another question, related to this topic - Is it possible to somehow make the sequencer bounce back and forth? If not, is there an easy mod that accomplishes this, say a little switch circuit that switches the direction of the sequence perhaps?
by patrickvf
Wed Nov 27, 2013 8:41 pm
Forum: PAiA Jabber
Topic: Issues with 4730 VCF, 4720 VCO
Replies: 4
Views: 15587

Re: Issues with 4730 VCF, 4720 VCO

Hmmm... why would it work that time and then not now? Could it be really as simple as funky solder joints? Guess I'm going to have to check that out then, eh? Meanwhile I'm going to replace it with the old VCO that was there in the first place to see if it's not something else after all. I'll keep y...
by patrickvf
Wed Nov 27, 2013 4:35 pm
Forum: PAiA Jabber
Topic: paia 2720 keyboard: fixing uneven/crooked keys...
Replies: 3
Views: 15278

Re: paia 2720 keyboard: fixing uneven/crooked keys...

Where can I get those rubber bumps, or what can I use as a replacement?
by patrickvf
Wed Nov 27, 2013 3:40 pm
Forum: PAiA Jabber
Topic: Issues with 4730 VCF, 4720 VCO
Replies: 4
Views: 15587

Re: Issues with 4730 VCF, 4720 VCO

Turns out both work fine, at least they did after reworking the power supply and testing them as the only modules in the system, but after stuffing the rest of the modules in the synth, the VCO doesn't do squat and only makes sound when I touch the tip of the CV plug. Didn't see anything loose on th...
by patrickvf
Wed Nov 27, 2013 3:29 pm
Forum: PAiA Jabber
Topic: 2720 Power supply - replaced capacitors, still hums.
Replies: 10
Views: 29897

2720 Power supply - replaced capacitors, still hums.

I have replaced the capacitors on the 2720 power supply about two days ago, and there is still a hum present. I'm not sure what to do next. The hum is either coming from the VCO module when it's not activated by a CV/trigger signal (however the hum seems to change in tone from output to output (no, ...
by patrickvf
Wed Nov 27, 2013 2:45 pm
Forum: PAiA Jabber
Topic: Paia 2720 BPF improvements?
Replies: 9
Views: 25803

Re: Paia 2720 BPF improvements?

hmmm.. can I hear more about this diode mod you talk about? What about turning the BPF into an SVF? In theory a BPF consists of a LP part and a HP part that cross-filter each other, am I correct? So shouldn't I be able to wire an output jack to the LP part, and one to the HP part? or is there more t...
by patrickvf
Wed Nov 27, 2013 12:54 pm
Forum: PAiA Jabber
Topic: Questions for LFO & EG mods
Replies: 0
Views: 14896

Questions for LFO & EG mods

This is a similar question like the one about the bandpass filter. In a nutshell, since it has been already tampered with in the first place, I would like to extend the LFO's depth and range. At this point in time it's simply too slow on the lowest setting, and I would like to get it into oscillator...
by patrickvf
Wed Nov 27, 2013 12:38 pm
Forum: PAiA Jabber
Topic: Paia 2720 BPF improvements?
Replies: 9
Views: 25803

Re: Paia 2720 BPF improvements?

I know about the trick with the inverter/buffer, however it takes it straight to scream plus the feedback/q appears to be affected by the lfo/envelope CV for the Cutoff. What I'm aiming for it so get the filter more fluid/squelchy sounding but the way as it is right now it's more like syrup.. mmmm s...
by patrickvf
Tue Nov 26, 2013 8:37 pm
Forum: PAiA Jabber
Topic: paia 2720 keyboard: fixing uneven/crooked keys...
Replies: 3
Views: 15278

paia 2720 keyboard: fixing uneven/crooked keys...

The keys on the keyboard are all uneven, as in some sit higher than others. Is there an easy way to get them straightened out?