[music-dsp] Realtime Reverb

[James Chandler Jr]

> I would be very interested to know what setup you came up with.  So if you
> could look up the code, that'd be really great.  I'd also be interested to
> know what configuration of delay lines you used for the early reflections.

Will dig up the code and post it in the next day or two. Code is on the Mac,
and I use the PC for internet stuff. Need to find the code, clean it up,
burn it to CD, and move it over to the PC. As you can see, have also been
too lazy to network my computers (G).

> Also, what is a good reference book for this stuff?  Ideally something
which
> covers other music-dsp topics (eg. bandlimited waveform generation etc.),

Gardner wrote a Reverb chapter of a big expensive DSP book that collects
various topics written by experts in the fields, "Applications of Digital
Signal Processing to Audio and Acoustics". Haven't bought it, but looks
good... http://www.wkap.nl/book.htm/0-7923-8130-0

Reverb and the other topics are covered in many DSP texts, but none of the
general texts delve deeply into any particular area. Its helpful to read
several references to try to piece together what they say.

Short of long FIR convolution of real room impulse responses, authors admit
that it is difficult to design a good-sounding reverb synthesized from
loops. It can be done, and some manufacturers have real good trade secret
reverb processes.

I haven't seen anyone claim that there is a scientific procedure to design a
good-sounding reverb out of loops. Seems mostly trial and error, fiddling
with stuff until it sounds good. If making lots of trial and error
experiments, one might keep good notes, to avoid accidentally losing a good
sound while attempting to improve it further (G).

James Chandler Jr.


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