Oscillator problem?
2002-11-11 by jpyn8
Earlier today I decided to start with a 'basic' patch and work my way through every single parameter in order to learn how things work. I didn't get very far because I discovered a potential problem with the two analog oscillators - they sound different even when I've programmed them exactly the same. OSC 1 seems to act as it should, but OSC 2 tends to make some noises that I don't think should be there. I can only explain it as a sort of "digital artifact" that appears to be slightly delayed. I've checked everything to make sure there are no Delays or Feedback loops programmed in. I've made two short soundfiles demonstrating this: http://www.absynthinteractive.com/evolver.htm - OSC 1 - this is how it should sound - OSC 2 - you can hear the noise on most of the hits...at one point it almost seems to cut out and jump back in, sort of like a "shorted" electrical wire. You might have to crank the volume up to hear the difference, or use headphones. Also, I'm pretty sure that it's happening in the oscillator because I can split the two left and right, then reverse the image (using the VCA Output Pan) and the noise follows OSC 2 wherever it is panned instead of staying on one channel. Here's a little more info about what's going on iin those samples. Both are set to C1 and a Pulse wave set at 50 for "square". The OSC Levels are both set around 78 or 79 because this is the point where OSC 2 begins to introduce this noise. OSC 1 will do it too, to a lesser extent, if I turn up it's Level to around 91 or so. Now, to me, this would indicate that I'm overloading the signal path somewhere, but get this: I can turn down the Level of OSC 2 to the point where the noise goes away, but then if I start to turn the VCA Envelope Amount DOWN from 100, the noise shows up again...if it's overloading a circuit somewhere, it doesn't make sense that it gets worse when turning the volume down like that. Anyone else axperienced a difference between OSC 1 and OSC 2? I apologize for the long-winded explination, but I'm trying to describe it as best as I can. I'm 99% certain that I've turned off all of the usual suspect parameters, such as Feedback, Delay, Hack, etc.