Author Topic: Questiong about bypass operation  (Read 375 times)

dormir

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Questiong about bypass operation
« on: March 21, 2022, 03:40:34 PM »
In the documentation it says:

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True bypass on In1/Out1 via latching relay

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Pi-Stomp Core has just a single bypass relay for the LEFT (in1/out1) channel.  in2/out2 is always engaged.

So bypass currently only works for mono operation, yes?

best,
dormir

Randall (Admin)

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Re: Questiong about bypass operation
« Reply #1 on: March 21, 2022, 06:59:00 PM »
Bypass of In1/Out1 works fine when running stereo, but only for In1/Out1, while In2/Out2 will always be processed.  You could use "software bypass" for In2/Out2 with a direct connection, or switched connection via one of the switch utility plugins, but the signal will go thru A2D and D2A conversion unlike In1/Out1 which when bypassed is truely passed as analog.

That design decision was made to avoid another relay, two transistors, board space and two additional GPIO's, when the main usecase for true bypass is mono guitar signals.   

dormir

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Re: Questiong about bypass operation
« Reply #2 on: March 21, 2022, 08:27:19 PM »
Thanks for the reply! I think I get the gist of it and I completely understand the reasons for this design decision, still I'm a bit confused about what happens with the signal chain when for instance, I have a patch that goes from In1 mono through a series of FX and than out to stereo Out1/Out2. When I activate bypass there is now a direct analogue connection from In1 to Out1, but does In1 still go through the signal chain with its right stereo part out of Out2 or will Out2 now receive nothing because the In1 Input has been removed from the signal processing?

best,
dormir