moderated Re: fldigi 4.1.16 Pulse Audio configuration issue #raspberrypi #pi3

Dave - N9QNZ <dave@...>

As for #2, alsamixer shows mono stereo is output.  The incorrect "label" can be fixed by commenting out the mono section of /usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf

Assuming this is what you are referring to, this is an old and well known "issue".

On Tue, Nov 17, 2020 at 6:31 PM G8DQX <list@...> wrote:


a good question. PulseAudio has not been part of Pi OS (née Raspbian) since Raspbian Stretch. It was introduced to support Bluetooth audio, but was dropped in Stretch, and is absent from Buster. My observations in Buster, when PulseAudio is installed, are (on Pi 4B hardware) that:

1) Bluetooth audio is not supported when PulseAudio is active (it is under ALSA)

2) audio from the 3.5mm socket is reduced to mono (under ALSA, the audio is stereo, of pretty high quality)

The reasons for this behaviour are not directly known. The behaviour is consistent with the dropping of PulseAudio, which is otherwise generally easier to use than raw ALSA.

HTH, 73, Stay Safe,

Robin, G8DQX

From the release notes (

  * Based on Raspbian Stretch (Debian version 9)
  * Version 60 of Chromium browser included
  * Version 3.0.1 of Sonic Pi included
  * Version 6.1.1 of RealVNC included
  * Version 0.17.4 of NodeRED included
  * Bluetooth audio routed via ALSA rather than Pulseaudio

On 17/11/2020 18:53, Dave - N9QNZ wrote:
In what ways is pulseaudio "broken"?

On Tue, Nov 17, 2020 at 9:45 AM G8DQX <list@...> wrote:

had you specifically installed PulseAudio? On Buster it is not installed
by default. If you do install PulseAudio, then it is broken in several
respects. Pi OS Buster expects you to use ALSA, which, as far as my
informal tests go, fully supports built-in audio & audio peripherals.

73, Stay Safe,

Robin, G8DQX

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