I have traced out the waveforms on a scope and have determined the parameter values of the basics.
Triangle Wave 4
Triangle-Saw Wave 30
Saw Wave 90
Square Wave 178
Osc 3 triangle is slightly different in shape. My Osc 3 is sort of a "shark tooth" triangle wave. The Osc 3 timbres though sound extremely close to 1 and 2.
It may be that as Osc 3 is used as an LFO, the shaping / timing circuitry may be different. As a builder of DIY modular components, I would LOVE to see a schematic. Has MoogMusic released a schematic ?
I printed a chart of these values to make setting up faster for Arturia minimoog D to voyager patch "transfers".
On a spectrum analyzer with the filter total CW (255), no resonance or env. modifier, overtones can be seen up to and beyond 25Khz. These were only seen during "note on" events.
There is a small hump (~4uV) from 19 to 22 Khz . volume control independent or triggering.
On the low end peaks at 130hz, 250hz, 540hz. Volume independent and triggering.
Both ouputs L,R summed.
I am only reporting these values as those I have observed. This is not intended as fodder for flames or as definative. Its only a crazy Moog nuts findings on my instrument.
YMMV,
Stefan
Voyager Waveforms
YMMV indeed! Good info to know, but I'm willing to bet that that everyone's Voyager settings will be just slightly different than what you observed.
Ah, the nature of analog - you gotta love it!
Concerning the outputs, it might be instructive to check each output individually to see how closely the filters match. With both filters summed, phase interactions could result in false readings.
Got any pix of your investigatiions?
Ah, the nature of analog - you gotta love it!
Concerning the outputs, it might be instructive to check each output individually to see how closely the filters match. With both filters summed, phase interactions could result in false readings.
Got any pix of your investigatiions?
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synthwalker
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What OS rev. are you using ? With earlier OS, VCO 3 max waveform value was 250 as far as I remember. For a given value, it produced a slightly different waveform (and sound) than the other VCO (which went up to 256). I had reported that to Moog who fixed it in the following OS.Osc 3 triangle is slightly different in shape. My Osc 3 is sort of a "shark tooth" triangle wave. The Osc 3 timbres though sound extremely close to 1 and 2.
Nice work!
Excellent detective work!
When comparing the output of the left and right outs on a scope, I would advise one to use the same probe on each in turn if possible, unless you know you have a well-matched pair. I was checking for a possible level mismatch (one channel louder than the other) and what I was seeing was actually the difference between the two different scope probes I was using. Just a caveat in case it helps anyone out there...
When comparing the output of the left and right outs on a scope, I would advise one to use the same probe on each in turn if possible, unless you know you have a well-matched pair. I was checking for a possible level mismatch (one channel louder than the other) and what I was seeing was actually the difference between the two different scope probes I was using. Just a caveat in case it helps anyone out there...
Voyager Waveforms
I upgraded to Voyager OS 2.5 as soon as I got it as to use the Mac editor.
I will indeed check each ouput to see what lies at the noise floor and bandwidth tests.
One unrelated question though, I noticed the pitchbend difficulties I previously posted about may still be plagueing me.
Previous history: [
Had OS 2.4 on purchase. Upgraded to 2.5 ASAP. Learned later about OS 2.1 upgrade procedure. Did a reset of parameters in Copyright menu. Still had strange tuning problem. Found the pitchwheel discrepancy +1 instead of 0. Corrected offset by tweaking pot under LHC. Everything seemed OK but, ]
Two observations only made last night:
When using Init Parameters to set a new patch, pitch off until pitchwheel moved. Everything Ok after. Checked pitchwheel parameter. It is still zero at center.
When changing preset banks via sysex using sysex librarian, some patches (does not matter which preset bank chosen AE or Sig etc.) that according to the pitchwheel menu should have bend, do not. If I reset back to Zon or reset the parameters in copyright submenu all is OK again.
OS screen says os 2.5 boot 2.5. I am assuming I successfully upgraded the os. I used voyager demo to do so. It behaved like the manual says it should.
any suggestions?
Stefan
I will indeed check each ouput to see what lies at the noise floor and bandwidth tests.
One unrelated question though, I noticed the pitchbend difficulties I previously posted about may still be plagueing me.
Previous history: [
Had OS 2.4 on purchase. Upgraded to 2.5 ASAP. Learned later about OS 2.1 upgrade procedure. Did a reset of parameters in Copyright menu. Still had strange tuning problem. Found the pitchwheel discrepancy +1 instead of 0. Corrected offset by tweaking pot under LHC. Everything seemed OK but, ]
Two observations only made last night:
When using Init Parameters to set a new patch, pitch off until pitchwheel moved. Everything Ok after. Checked pitchwheel parameter. It is still zero at center.
When changing preset banks via sysex using sysex librarian, some patches (does not matter which preset bank chosen AE or Sig etc.) that according to the pitchwheel menu should have bend, do not. If I reset back to Zon or reset the parameters in copyright submenu all is OK again.
OS screen says os 2.5 boot 2.5. I am assuming I successfully upgraded the os. I used voyager demo to do so. It behaved like the manual says it should.
any suggestions?
Stefan
Voyager Waveforms
After experimenting last night, I found the answer to my problem regarding pitch bend. It seems that using sysex librarian, I was loading old preset banks. This is not exactly intuitive so allow me to explain.
After updating the voyager to os 2.5 I would load presets downloaded from moog and experience the pitch shift weirdness. to remedy I would reset the parameters under copyright submenu and all was well after. I DID NOT however resave the preset bank back to sysex librarian. So each time I loaded a different bank I was undoing something. Something was not being saved. So I think, because after saving each bank after parameter reset under copyright submenu everthing works fine now. Each load of a preset bank now causes proper pitch controller behaviour including after init parameter comand for new sound building. All is well. It would seem that something gets saved to the presets when upgrading.
I'm posting all this in case anyone else has this problem. I should have probably just broke down and got the moog librarian and used it.
Now I can concentrate on some measurement fun
Stefan
After updating the voyager to os 2.5 I would load presets downloaded from moog and experience the pitch shift weirdness. to remedy I would reset the parameters under copyright submenu and all was well after. I DID NOT however resave the preset bank back to sysex librarian. So each time I loaded a different bank I was undoing something. Something was not being saved. So I think, because after saving each bank after parameter reset under copyright submenu everthing works fine now. Each load of a preset bank now causes proper pitch controller behaviour including after init parameter comand for new sound building. All is well. It would seem that something gets saved to the presets when upgrading.
I'm posting all this in case anyone else has this problem. I should have probably just broke down and got the moog librarian and used it.
Now I can concentrate on some measurement fun
Stefan