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Pot next to RCA jacks labeled "in" not adjust headphone

Posted: Mon Apr 02, 2018 9:08 am
by milosz
What does the pot next to the "IN" RCA jacks do?

Neither pot has any effect on headphone volume using mpc as a source.

I've got an AUDIO DEVICE SETTINGS gui panel for audioinjector-pi-soundcard (Also mixer) and I have two slides on it, with "Master" above them, one slider has a button with a speaker icon below it, the other slider has a "chain link" button below it... the sliders move in unison, and raise / lower the output from the 3.5 mm headphone jack... not sure exactly how the buttons work or what exactly these two sliders actually are doing in the circuit....
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Is there documentation on this some place?

Is there a setting I need to invoke in order for one of the pots to adjust headphone volume?

Re: Pot next to RCA jacks labeled "in" not adjust headphone

Posted: Tue May 08, 2018 8:23 pm
by flatmax
Hi there,

On the zero version of this sound card, you can use an IO board to pass the headphone out through a pot to the connectors.

Otherwise you have to use software - such as alsamixer.

Matt

Re: Pot next to RCA jacks labeled "in" not adjust headphone

Posted: Tue May 08, 2018 9:33 pm
by milosz
This is the card that I have, it is not the "zero" card, and it has a built-in headphone jack

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