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Help building headphone switchbox with features

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idoa

New Member
Here is the basic switchbox I need:
2 inputs
2 outputs
so there is 2 switches.
*each input/output is stereo 3.5mm jack which has 2 pins and ground.

Now, to make it shiny I want 7seg for each switch.
let's say I'll use the HP series 7032 (which has dec->7seg built-in)

any ideas how to start?
 
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