Thanks Peter, but I am not sure to understand. There is usually a trim pot to fix this- it does as you are doing and adds a bit of negative DC to the control input. The output curve approaches 0 as a limit, but doesn't actually get there. This is a common problem with analog exponential VCAs. the Malekko VCA does have spill problemsīut most of this is surprisingly difficult to reproduce and I cannot find a logic behind it. the Malekko VCA has no spill problems (even with gain at maximum and no Triatt negative offset) This situation is worst when using the Maths as amplitude envelope controlled by its "->" input (no problem with the trig input), this is why I am describing this test with the Maths.īut when using other envelopes instead of the Maths: No problem with bipolar gates (eg Dixie 1 square output in LFO mode). The A-190-5 is not the problem, this happens with any positive gate. * If VCA = "Doepfer A-130-2": No spill (well TODAY AT LEAST - I just plugged it for the first time 1h ago) VCA", there is some spill except when using workaround 1) above * If VCA = "Malekko VCA" (linear mode), there is some spill except when using these workarounds:ġ) add a slight negative offset to the gate (using channel B of the Triatt: there is a threshold under which the spill suddenly disappears)Ģ) do not put the Malekko VCA gain at maximum (there is a threshold under which the spill suddenly disappears) * Maths channel 1 output connected to VCA CV input * Triatt C output connected to Maths (red version) channel 1 slew input (" ->") * A-190-5 gate output connected to Intellijel Triatt input A I wanted to post here because maybe someone will have an idea reading the test below. On a few occasions there was some spill from low pass gates, which is generally considered as something normal that can happen, and I did correct this using either the Malekko or STG VCAs after the LPG. I am almost sure it did not happen before, or at least there was a lot less spill so that it was not a problem for recording songs. Nothing changed in my room nor my modular system. I did many tests but don't understand what's going on. Doepfer A-130-2 (this one I got today because of this problem, and it does seem to always work) When they are supposed to be silent you can still hear some sound. In my modular system the VCAs don't work properly for controlling the audio amplitude.
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