On 6/23/14 3:39 PM, Bogac Topaktas wrote:
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.
it gets better behaved as the signal swings close to the rails? that's
an odd non-linear behavior. (perhaps, not so odd, zero-crossing
distortion you get from Class B and AB amps have an issue about that.
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.
when have i advocated inauthenticity?
and how authentic might this sound when the signal swings to a high
level and the thing clicks or blaps or hiccups on you?
--
r b-j r...@audioimagination.com
"Imagination is more important than knowledge."
--
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
