Asymmetrical behaviour

Gear talk
#1

I’m testing discrete VCF based on this concept.
I noticed that resonance on the square wave is… asymmetrical:

I did a little research and I found that Korg35 filter has the same behaviour.
Is this “bug” or “feature”? Do I have correct this? Is this behaviour impoverish the sound (or something)?

#2

You might wan’t to talk to Andre of TubeOhm about this… also read thru the Shruthi Ladder filter thread…
My Shruthi XT ladder has a switch for symetric, anti-symetric and something in between. It’s a great sounding kind of distortion.

#3

I’d say “feature”, it surely brings a bit of character!

#4

Everything can be a feature instead of a bug as long as you like it. :slight_smile:

#5

@MaxZorin I think it looks fine, just fine, and perfect symmetry seems kind of boring doesn’t it?

#6

Ok, thanks guys :slight_smile:
It’s funny, I did first tests a few month ago, but it seems that I’ve never looked at square wave with resonance on the oscilloscope.

#7

Yep, the standard work on the Korg35 filter that shows exactly this graph is by Tim Stinchcombe, and you can download it here

Martin