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switching effect b/w line and effects loop?

Posted: 01 Jan 2012, 14:20
by daz
Hi there,
I'm tinkering with an idea for a effect/preamp circuit and a true bypass effects loop. There would be three switches:
1. to turn the preamp on/off
2. to switch the looper on/off
3. to route the preamp to be in line (i.e. after the input jack so preamp is the signal path whether looper is on or not), or just in the true bypass effects loop.

Here's how I initially wired up:

Image

I know there's something not right with the switch to switch preamp in line or in the loop- my brain has gone fuzzy!
I haven't included in any grounding etc at the moment, just working out the signal path at this stage.
Any help is appreciated. Thanks in advance.