So in order to demonstrate that a set of things are not alike, you're showing me a set of things that are exactly alike with small differences in frequency content?Lotuzia wrote:For those who are interested in figures just take a look at the middle of this page, and you'll see -litterally- that oscillators are not all similar -by far- in analog synthesizers
Do you know what a slew limiter is? You can have a slew limiter built from an integrator or lossy integrator or any sort of filter.
Apply a slew limiter with up/down slews at different rates to a pure square and you get the results in the images you've linked. They're all identical.
So the bozos who did this possibly used a crummy approximation for filter coefficients #1 combined with the fact different analogs will have different slopes depending upon temperature, age and pure component variation #2.
- Try using a different sample rate
- Simply randomly adjust the coefficients
The downward slew here is about half the rate of the xils 3 slew.
The slew here is at least twice the rate, plus the roll-off is much sharper than xils 3. The image shows what appears to be the effect of the audio input's anti-aliasing filter while the natural slew is most likely far higher.