Inverted speaker stereo polarity

Inverted speaker stereo polarity - Printable Version

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+--- Thread: Inverted speaker stereo polarity (/showthread.php?tid=9555)

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RE: Inverted speaker stereo polarity - manawyrm - 04-15-2020

(04-14-2020, 11:53 AM)zaius Wrote: Although what happens if Pine fixes the hardware? [..]

Manjaro are always in touch with Pine64 and I don't think they'd do such a hardware change without notifying us.
If they wanted to fix this issue in newer revisions, we would need to have a version indicator (maybe through some sort of hardware e-fuse) or some other thing (like a GPIO state).
But for now it's good enough with the current solution Smile

RE: Inverted speaker stereo polarity - slyecho - 04-16-2020

I reinstalled Manjaro ARM 20.04 and it is all correctly handled out of the box. So good job and I won't have to reach for the soldering iron any more. Also, Manjaro ARM is going to be the factory OS, so all good for new users too.

RE: Inverted speaker stereo polarity - Artcfox - 09-22-2020

I recently received a Pinebook Pro (September 2020), and noticed that my speaker output has the polarity reversed.

The contents of:

Code:
/etc/acpi/audio_jack_plugged_in.sh

was:

Code:
#!/usr/bin/env sh

case "$3" in

        plug)

                amixer sset Speaker off

                amixer sset 'Playback Polarity' Normal ;;

        unplug)

                amixer sset 'Playback Polarity' 'R Invert'

                amixer sset Speaker on ;;

esac

but when I tried running one of those commands manually I received the following error message:

Code:
Unable to find simple control 'Playback Polarity',0

Once I modified the contents of the file to:

Code:
#!/usr/bin/env sh

case "$3" in

        plug)

                amixer -c 0 sset Speaker off

                amixer -c 0 sset 'Playback Polarity' Normal ;;

        unplug)

                amixer -c 0 sset 'Playback Polarity' 'R Invert'

                amixer -c 0 sset Speaker on ;;

esac

It works properly, and my speakers are no longer out of phase.

This is the YouTube video I used to test the polarity: https://www.youtube.com/watch?v=H-kxtKGR2vY