`ve.diodeLadder` clips massively

[dziemba]

When running the following:

process = os.oscsin(200) 
  : *(vslider("gain", 0, -48, 0, 0.1) : ba.db2linear) 
  : ve.diodeLadder(0.9, 1);

I need to reduce the gain by almost -41dB in order for the resulting waveform not to clip / turn into a square wave.
This is surprising, since a unity-amplitude sine wave shouldn't clip when ran through a filter like that.

Am I using it incorrectly (the documentation doesn't state anything) or is this a bug in the implementation?
Similar filters (e.g. moogLadder) don't show this behavior.

[dariosanfilippo]

Hi, Niko. If you look at the block diagram, you'll see a cubic nonlinearity at the input of the filter followed by a linear gain of 1.5. Looking at the documentation of the nonlinearity, it appears that the distortion amount is set to 1, which is the maximum. However, even if you set the distortion amount to 0, it'll still shape your input. I don't think that the Moog Ladder has anything like that; you could copy the code that you find in the libraries and remove the part that causing your issues. Cheers, Dario

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On Wed, Feb 12, 2025 at 11:44 PM Niko Dziemba ***@***.***> wrote: When running the following: process = os.oscsin(200) : *(vslider("gain", 0, -48, 0, 0.1) : ba.db2linear) : ve.diodeLadder(0.9, 1); I need to reduce the gain by almost -41dB in order for the resulting waveform not to clip / turn into a square wave. This is surprising, since a unity-amplitude sine wave shouldn't clip when ran through a filter like that. Am I using it incorrectly (the documentation doesn't state anything) or is this a bug in the implementation? Similar filters (e.g. moogLadder) don't show this behavior. — Reply to this email directly, view it on GitHub <#214>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AHG3I2CGNV552ERY4TQAV332PPFDZAVCNFSM6AAAAABXAYJZPCVHI2DSMVQWIX3LMV43ASLTON2WKOZSHA2DSNJQHEYDONI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[dziemba]

Thanks for the pointers, I'll play around with it some more!