Re: [sc-users] make your digital oscillators sound like a moog!

[bhob rainey <lloydlyson@xxxxxxxxx>]

> SC3 content: The Moog ladder filter someone posted a while back does an

> EXCELLENT job of reproducing the behavior of an overdriven Moog 

> filter. One

> of my someday projects is to optimize that code to use table lookup 

> for the

> tanh() in that code, and to rearrange the filter structures such that 

> only 5

> tanh() are used per filter, instead of 9.

here, here.  that filter is pretty expensive.  I like the way the sound 

doesn't break up at high cutoff/ressonance - maybe that's the 

oversampling?

anyone who can find a way to make that filter more efficient, please do it and let me know!  i really like the sound of it, but even the optimizations i've already made have brought the quality down a pinch.  

the sound is good through high cutoff/resonance largely because of the way the cutoff and resonance are calculated.

also, in relation to control rate/audio rate differences... many (most) ugens are written such that control rate inputs are interpolated at audio rate.  so, you may only be sending values every 64 samples, but the ugen reading those values calculates the slope between old and new values and outputs something every sample.  it's not exactly the same as having an audio rate lfo, but it helps smooth out sc control rate modulations.

-bh