On Mon, June 23, 2014 7:37 am, robert bristow-johnson wrote: > the other thing Urs brought up for discussion is an iterative and > recursive process that converges on a result value, given an input. i am > saying that this can be rolled out into a non-recursive equivalent, if the > number of iterations needed for convergence is finite. this is a totally > different issue.
For most circuits involving non-linear feedback loops, number of iterations needed for convergence depends on signal level (while required accuracy kept constant). For instance, in Tube Screamer Overdrive circuit, number of iterations decreases when the signal gets closer to rails. Of course, it's possible to derive alternative equations to reach a fixed-step approximation (which -as you pointed out- is much more suitable for real-time operation). I totally agree with Urs. Today's market is all about authenticity, efficiency is just a plus. Bogac. -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
