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i'm looking for a schematic for a bypass looper
but i DON"T want to cascade the effects
i want with the flick of one switch, select an alternative effect loop
loop A, or loop b, or loop c, or loop D
so turning one on, turns off the one previously on.
ideas?

get a shift register and some relays. (or program an mcu to behave this way)

or what about putting a rotary switch into a wah shell? that could be cool.

multi_s wrote:get a shift register and some relays. (or program an mcu to behave this way)

elaborate?

ok. but first... if your cylcling through effect loops, what do you mean by true bypass?

IE, wouldn't the signal always be going through some effect ? well maybe with 1 "clean" loop. ...

anyways. you could just make a simple mcu interface with 1 button that "shifts" a bit accross a number of output pins. Then take that output and hook it up to a relay. although you might need transistor in front of the relay to boost the current but the idea is the same. I would just avoid relays though because teh signal is about to go to an effect anyways so why bother trying to maintain true bypass. There are analog spst switch ICs that do the same thing usign switched buffers.

OR

you could use an analog multiplexer. A multiplexer is like a mixer with many inputs but only one output. A clock or a command line dictates which "channel" is going to the output at any given time.

so you could do something like input->fanout to many effect loops->manyeffect loops fan into multiplexer->multiplexer outputs only one line. Normally a clock cycles through the channels but you could replace the clock with a foot switch instead.

Then you could have a master "true bypass" footswitch to bypass the whole thing.

The mcu thing is probably going to be more flexible. like why not ad an expression pedal so you can sweep through your effects loops haha.