[mythtv-users] Alsa volume control (and mute) not working...

mythtv at kosowsky.org mythtv at kosowsky.org
Sun Jan 31 19:04:19 UTC 2021


Curtis Gedak wrote at about 11:45:15 -0700 on Sunday, January 31, 2021:
 > On 2021-01-31 5:16 a.m., Mary Strimel wrote:
 > > On Sun, Jan 31, 2021 at 6:41 AM Jim Abernathy <jfabernathy at gmail.com> wrote:
 > > 
 > >>
 > >> On 1/31/21 12:11 AM, mythtv at kosowsky.org wrote:
 > >>> I am running mythtv-light 31.0.54 on my Raspberry Pi 4.
 > >>>
 > >>> I have:
 > >>>    Audio output device: ALSA:default
 > >>>    Mixer Device: AlSA:Default
 > >>>    Mixer Controls: Master
 > >>>
 > >>> I am able to hear audio but the (mythtv) keyboard volume control and
 > >>> mute don't have any effect.
 > >>>
 > >>> They do work if I change Mixer Device to "Software"
 > >>>
 > >>>
 > >>> Note: I don't have this problem on my x86 Ubuntu 18.04 mythtv server,
 > >>> so seems to be something about my Raspberry PI configuration.
 > >>>
 > >>> Any thoughts on why Alsa is not working as a mixer device?
 > >>>
 > >>> Thanks
 > >>
 > >>
 > >> I have never gotten ALSA:default to work on the RPI4.  I use HDMI for
 > >> both picture and sound, so I use something with hardware and HDMI in the
 > >> name. I can't remember the exact name because my RPI4 is not setup with
 > >> mythtv right now.
 > >>
 > >> Jim A
 > > 
 > > 
 > > For what it may be worth ... it took me a while to find the hdmi device
 > > because it wasn’t named “IEC-something something “ like the wiki said it
 > > should be. Mine had dw in the name, and only the description said hdmi.
 > > There was also a tick box to enable control through MythTV. Works fine.
 > > 
 > 
 > 
 > For mythfrontend v31 I set my RPi4 sound device as follows:
 > 
 >     ALSA:hw:CARD-b1,DEV-0              # HDMI sound
 >     ALSA:hw:CARD-Headphones,DEV=0     # For 3.5mm analog audio
 > 
 > I noticed in the 2020-12-02 release of Raspberry Pi OS [1] that
 > PulseAudio is now included and running by default.  That might be
 > related to the volume control behavior you are experiencing.
 > 

I don't think it's about setting the audio device, because
Alsa:Default did give me sound -- I just couldn't control the volume
or mute it.

It seems like the problem may be a pulseaudio conflict, because when I
killed pulseaudio, I got control over the volume and mute functions.


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