"Rich Grise" bravely wrote to "All" (29 Dec 05 01:06:02)
--- on the heady topic of " 6v & 90v DC Power supply"

RG From: Rich Grise
RG Xref: core-easynews rec.radio.amateur.homebrew:90355
RG sci.electronics.design:535244


RG On Wed, 28 Dec 2005 22:03:48 +0000, Joerg wrote:

Hello Rich,

It seems like, no matter how closely you try to mimic the waveform of a
real instrument,...


I have a feeling that this is exactly the problem. Engineers try to
mimic the output waveform instead of looking how the real instrument is
built. If they did that, they'd try to emulate all the individual parts
and pieces.

Regards, Joerg

http://www.analogconsultants.com

RG Yabbut, how many gyrators and and stuff does it take to
RG model, for example, a bowed string? ;-)

RG Thanks!
RG Rich


One wouldn't use gyrators and phase shifters but rather wavetables.
In a nutshell, it is a sample (digital recording) of the real
instrument. Then it is digitally manipulated to add modulation, timbre
characteristics, and whatever other effects are required for the
instrument. This is calculated for each note and stored in a table in
memory, hence the name wavetable. Then this is read out to the digital
to analog converter. The resulting sound is hard to tell apart from
the real instrument. Another even more realistic and versatile method
uses digital building blocks to mimic each physical component. For
example in the case of the human voice, the nose, the mouth, windpipe,
etc. One can create totally non-existant instruments like a violin
that sounds like a flute or whatever else you could possibly imagine.
There is a program which does this but I'm drawing a blank now.

A*s*i*m*o*v

.... Guitar smashing doesn't bother me. Some "need" smashing. -Chet Atkins