mate-volume-control and bluetooth HandsFree, only noise

[joakim-tjernlund]

Expected behaviour

Test Speakers should "talk"

Actual behaviour

Test Speakers only produces noise

Steps to reproduce the behaviour

Connect a bluetooth head set, got Sound Prefs and select BT headset,
do Test Speakers. An Mono test box appears but klicking Test only give you noise

MATE general version

1.20

Linux Distribution

Gentoo

Link to downstream report of your Distribution

None

[raveit65]

I am using blueberry-applet to connect bluetooth devices.
Sometimes but not always i need to restart the pulseaudio daemon before i can pair my headset or my bluetooth speakers.
After connecting i see both devices in mate-volume-control and i can use the test program.
And i hear front-left and front-right in my bluetooth headset.

The test program use only a so called white noise for testing a subwoofer from my 2.1 loudspeaker system.
Maybe your audio channels are reversed

[joakim-tjernlund]

hmm, I suspect you are connected only as headset without microphone(Looks like so
as I can see A2DP in your pics) ?
I am using HFP(some use HSP) profile which can use the microphone.
Both HFP and HSP(Ithink) use Mono

[raveit65]

hmm, I suspect you are connected only as headset without microphone(Looks like so
as I can see A2DP in your pics) ?

Yes

[joakim-tjernlund]

Would be nice to be able test "Mono" headsets. Anyone that can try the HSF/HFP profiles
and figure out what goes wrong?

[joakim-tjernlund]

The Mono speaker test can be make to play sound and not just noise by adding:

--- gvc-speaker-test.c.org	2022-06-26 14:04:52.236419200 +0200
+++ gvc-speaker-test.c	2022-06-26 14:11:36.486615875 +0200
@@ -174,6 +174,8 @@
                 return "audio-channel-front-right";
         case MATE_MIXER_CHANNEL_FRONT_CENTER:
                 return "audio-channel-front-center";
+        case MATE_MIXER_CHANNEL_MONO:
+                return "audio-channel-front-center";
         case MATE_MIXER_CHANNEL_BACK_LEFT:
                 return "audio-channel-rear-left";
         case MATE_MIXER_CHANNEL_BACK_RIGHT:
@@ -207,6 +209,10 @@
                 return playing
                         ? "audio-speaker-center-testing"
                         : "audio-speaker-center";
+        case MATE_MIXER_CHANNEL_MONO:
+                return playing
+                        ? "audio-speaker-center-testing"
+                        : "audio-speaker-center";
         case MATE_MIXER_CHANNEL_BACK_LEFT:
                 return playing
                         ? "audio-speaker-left-back-testing"

Did not find a Mono test so I just borrowed center-test

[joakim-tjernlund]

Maybe your subwoofer will fit into Mono as well?
If there is not match there will be pink noise instead, may some default is needed too?