Stereo To mono

Stompboxes circuits published in magazines, books or on DIY electronics websites.

Stereo To mono

Postby lukatosh » 29 Dec 2016, 23:54

Hello guys,

My name is Lucas and I'm writing you from Chile. So ... Excuse my english.

Well, I would like to make a box that offers the option to give a mono out from a stereo signal at the input.

The stereo signal at the input comes from the last pedal of my set-up, an eventide time factor that sometimes i use in stereo.

To achieve this, i took the GGG simple guitar mixer circuit. With a 3PDT i would like to select betwen stereo (stereo in - stereo out, just routing) or mono out (Left in and Rignt In mixed).

The third row of the 3pdt will be used for led indicators: Mono or stereo.

Also, i would like to use this as a standar routing box. Sometimes I use the mono out of the eventide or other effect. For that, i added a switched input jack for the R-In. If the jack is unplugged, the right signal that goes into the mixer is muted (grounded). Then... the output will be only the L/mono input.

This goes like this, to match the "mono led".

The other way is seting the 3pdt to stereo mode (just routing) and then just use the L/mono-in and L/mono-out, but the "stereo led" will be on.

i'm planning to put thi on the breadboard probably the next week, but before that i would like to ask you for maybe some correctios or improvements to the proposed idea (Noise performance - Should add a Pf capacitor on the feedback loop of first op amp?, maybe use NE5532, What about impedances?)

Hope you can help me, here is the design.


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Thanks in advance, best regards... happy new year! [smilie=drink.gif]
lukatosh
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