[sdiy] Delay / Reverb options

[Theo]

It has been a while since the last modification,
but if I remember well the reverb IC inside the Roland D50 is from National.

Theo


From: Byron G. Jacquot <thescum at surfree.com>



> >I'm interested in building my own delay/reverb effects, and I was
wondering
> what you guys have found to
> >be the more economic and / or better sounding optiosn out there.  Any
help
> is appreciated.
>
> Economic:
> Spring reverb driven by a one-chip audio power amplifier.  You can use
> slinky springs taped or glued to small speakers if you really want to
> experiment.  Put 2 speakers on opposite ends of the spring.  Drive one as
> you would normally, and wire the other backwards, as a moving coil
> microphone.  You can impart some interesting character following the
output
> with an EQ or compressor.
>
> Or your own take on the "Cooper Time Cube" for delay: a long piece of
> tubing, with a speaker at one end, and a mic at the other.
>
> Better sounding:
> Look into DSP development kits from Analog Devices, Motorola and TI.
Delay
> is pretty simple to get working, reverb can take some tweaking.  If you've
> got the processing horsepower, look into convolution against good impule
> response samples.
>
> You might also look around at some of the semiconductor companies.  At one
> point I know I saw some "dedicated" reverb/deley/multiFX chips from
someone.
> It might have been Holtek, but National rings a bell, too.  Does anyone
else
> remember?
>
> Byron Jacquot
>