From yahoo Sent Tue, Nov 7th 2017, 15:29
From yahoo Sent Tue, Nov 7th 2017, 15:29
It should read "I could NOT detect any difference ...". Sorry. Dieter > -----Ursprüngliche Nachricht----- > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx] > Gesendet: Dienstag, 7. November 2017 16:26 > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > Betreff: AW: [Doepfer_a100] Envelope Generator Problem > > > Hello, > > I took an A-140 and cannot confirm this behaviour. That's what I did: > > - wait about 10 seconds > - permanent high signal to the gate input > - measuring the ADSR output (especially the peak voltage) with > oscilloscope -> peak is about +8.4V > - replacing the permanent gate signal by an LFO rectangle with about 10 Hz > - measuring the ADSR output (especially the peak voltages) with > oscilloscope -> all peaks are about +8.4V > > I could detect any difference in the peak level of the "first" envelope > (permanent gate) and the peak levels when the A-140 was triggered by the > LFO. > > Best wishes > Dieter Doepfer > > > > > -----Ursprüngliche Nachricht----- > > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx] > > Gesendet: Dienstag, 7. November 2017 04:11 > > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > > Betreff: [Doepfer_a100] Envelope Generator Problem > > > > > > > > > > > > Hi Folks > > > > Sorry to post this again but my whole modular synth is unusable > > until I fix this problem so I still need help. > > > > The problem: All of my envelope generators do the same thing - > > When I play a note they peak at a certain voltage, lets say 5 > > volts. But when I play a second note that peak rises to 6 volts. > > And in some cases when I play 16th notes it rises even more. > > > > So when I connect the output of an envelope generator to a VCA > > the first note I play is always MUCH quieter than every following note. > > > > I have 3 Doepfer LC9 cases with various modules in each. This > > behavior is consistent in all three boxes with all of my envelope > > generators. > > > > The modules are: > > Doepfer A-140 (3 of these) > > Doepfer A-143-2 quad > > Roland 540 > > > > Also, the all 4 of the envelopes in the A-143-2 do not actually > > sustain. The voltage constantly falls when a note is held, even > > when the sustain level is set to maximum. That is a separate > > problem but I thought I'd mention it. > > > > Also, for some reason the release time of the Roland 540 is only > > 2 seconds (even on the Slow setting) when plugged into any VCA, > > however when it is plugged into the Roland filter the release > > time is much longer. Another weird problem but I thought I'd > > mention it in case it was an important clue. > > > > I have tested the output of all of the envelopes with both analog > > and digital volt meters to confirm the behavior. > > > > At this point I'm not sure what to do to fix this. I guess the > > first question is: Is this the way these envelopes are supposed > > to work? I have owned analog synthesizers since 1978 and own a > > lot of them right now and not a single one has this behavior. > > Other than when using velocity sensitivity, every note played is > > exactly the same volume. > > > > Is this a known issue? Are there combination of modules that can > > cause this to happen? Could it be the power supplies? I have > > moved the modules around and found the behavior is the same > > regardless of how many modules (or which ones) are in a case. > > > > What kind of troubleshooting can I do? With only a trigger > > voltage being sent to the Envelope module I don't think there > > could be anything else interfering but I'm looking for any clues > > at all, even the most obvious ones that I may have overlooked. > > > > I did a video to show the problem: https://youtu.be/x8_1ZnmPWLo > > > > Thanks for any ideas anyone might have! > > > > Scott > > > > > > > > > > > > > > > > ------------------------------------ > > ------------------------------------ > > > ------------------------------------ > > Yahoo Groups Links > > > ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Doepfer_a100/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Doepfer_a100/join (Yahoo! ID required) <*> To change settings via email: xxxxxxx_xxxx-xxxxxx@xxxxxxxxxxx.xxx xxxxxxx_xxxx-xxxxxxxxxxxx@xxxxxxxxxxx.xxx <*> To unsubscribe from this group, send an email to: xxxxxxx_xxxx-xxxxxxxxxxx@xxxxxxxxxxx.xxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/