Analogue Reverberator

[Dave Eason]

Hey Guys,

I was just thinking to myself if it would be possible to build a reverb pedal without mechanical parts or a microprocessor.  I made an audio unit reverb plugin in C++ which just used a 3 tap delay line, with the delays kept really short and mixed together; could you do this with an old bucket brigade chip, with multi tap outputs, using the same principle?  I can't think of any actual analoge reverb devices that haven't either got a spring or plate in, or use firmware on a micro (or other digital system).

Just out of curiosity, can anyone recommend any god places online where you can send them a board layout and they can manufacture a pcb fairly cheaply, and send it back?

cheers,

David

[trevize]

Yes it can be done, if you can find the panasonic mn3011, a 3328 stage bbd chip with 6 taps.
there's a project of a reverb based on this chip on synthdiy:
http://www.synthdiy.com/files/2003/eti-mn3011reverb.pdf
and the datasheet:
http://www.synthdiy.com/files/2003/MN3011.pdf

[MetalGuy]

Better try the Femtoverb /in the DSP section/. You'll get 16 effects in one most of the reverbs. Or if you don't want to bother just go for one of these /strange, it was available couple of days ago/:

http://www.bananas.com/productdetail.asp/pid_8330/productname_Behringer-DR100-Digital-Reverb-Pedal

[Mark Hammer]

Better yet, the MN3011 has not been in production for several decades, and every single one is precious for repairing anything that was based on them.  In contrast, the Alesis/Wavefront chips ARE still in production, with sufficient quantity to supply all those Chinese/Korean manufacturers banging out those $150 amps with built in effects.