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In spite of at the risk of someone closing this question as a duplication, I would like to ask a specialist here how can I use the pactl command right to adjust the volume of microphones, speakers, earphones, headset and Bluetooth devices.
I have a Sony Xperia 10 Dual with SFOS 3.2.1.20 and I am unhappy with some volume settings. For example, the volume (speaker ans micro) of Android apps like WhatsApp is very quiet and the call volume is also very low. While I was looking for here in the forum and I found a lot of splitted knowledge. But no question went deeper and in detail into the pactl command.
So I used the commands pactl list sinks and pactl list sourses to list all the available destinations.
Then I tested pactl set-volume-sink 0 150% and pactl set-volume-sink 1 150% and pactl set-volume-sink 2 150% but it not work for the BT headset. Maybe I have to restart the pulseaudio service? I tested systemctl restart pulseaudio.service but got a Error6. If I use systemctl --user restart pulseaudio.service I got the same Error. For micro I used pactl set-volume-source 2 150% and this works.

I create this two files: pactl list sinks.txt and pactl list sources.txt Now I have a few questions because I couldn't change the volume of the speaker.

1. Could anybody explain me the sinks 0 - 1 - 2 ? Which sink is what? I need more Volume on my headset BH-505 from Nokia for Sailfish and Android Apps, but will not more volume on the speaker because I am affraid that I kill it.
   Sink #0 Status: SUSPENDED Name: sink.primary_output Description: Droid sink primary_output
   Sink #1 Status: SUSPENDED Name: sink.deep_buffer Description: Droid sink deep_buffer
   Sink #2 Status: SUSPENDED Name: sink.null Description: Null-Ausgabe

2. Could anybody explain me the sources 0 - 1 - 2 - 3 - 4 ? Which sink is what?
   Source #0 Status: SUSPENDED Name: sink.primary_output.monitor Description: Monitor of Droid sink primary_output
   Source #1 Status: SUSPENDED Name: sink.deep_buffer.monitor Description: Monitor of Droid sink deep_buffer
   Source #2 Status: SUSPENDED Name: source.droid Description: Droid source droid
   Source #3 Status: SUSPENDED Name: sink.null.monitor Description: Monitor of Null-Ausgabe
   Source #4 Status: SUSPENDED Name: source.null Description: Null Input

3. It is necessary to restart the pulseaudio service or the app which give the audiosignal after a change?

4. I noticed also that all changes will reseted after a restart, but this is not so bad, because I have the app ShellEx. But maybe it is possible to change a config file? Where is this located?

Thanks for all posts in advance and please do not close this question so early, because I saw that many users are interested on this.

In spite of at the risk of someone closing this question as a duplication, I would like to ask a specialist expert here how can I use the pactl command right to adjust the volume of microphones, speakers, earphones, headset and Bluetooth devices.
I have a Sony Xperia 10 Dual with SFOS 3.2.1.20 and I am unhappy with some volume settings. For example, the volume (speaker ans micro) of Android apps like WhatsApp is very quiet and the call volume is also very low. While I was looking for here in the forum and I found a lot of splitted knowledge. But no question went deeper and in detail into the pactl command.
So I used the commands pactl list sinks and pactl list sourses to list all the available destinations.
Then I tested pactl set-volume-sink 0 150% and pactl set-volume-sink 1 150% and pactl set-volume-sink 2 150% but it not work for the BT headset. Maybe I have to restart the pulseaudio service? I tested systemctl restart pulseaudio.service but got a Error6. If I use systemctl --user restart pulseaudio.service I got the same Error. For micro I used pactl set-volume-source 2 150% and this works.

I create this two files: pactl list sinks.txt and pactl list sources.txt Now I have a few questions because I couldn't change the volume of the speaker.

1. Could anybody explain me the sinks 0 - 1 - 2 ? Which sink is what? I need more Volume on my headset BH-505 from Nokia for Sailfish and Android Apps, but will not more volume on the speaker because I am affraid that I kill it.
   Sink #0 Status: SUSPENDED Name: sink.primary_output Description: Droid sink primary_output
   Sink #1 Status: SUSPENDED Name: sink.deep_buffer Description: Droid sink deep_buffer
   Sink #2 Status: SUSPENDED Name: sink.null Description: Null-Ausgabe

2. Could anybody explain me the sources 0 - 1 - 2 - 3 - 4 ? Which sink is what?
   Source #0 Status: SUSPENDED Name: sink.primary_output.monitor Description: Monitor of Droid sink primary_output
   Source #1 Status: SUSPENDED Name: sink.deep_buffer.monitor Description: Monitor of Droid sink deep_buffer
   Source #2 Status: SUSPENDED Name: source.droid Description: Droid source droid
   Source #3 Status: SUSPENDED Name: sink.null.monitor Description: Monitor of Null-Ausgabe
   Source #4 Status: SUSPENDED Name: source.null Description: Null Input

3. It is necessary to restart the pulseaudio service or the app which give the audiosignal after a change?

4. I noticed also that all changes will reseted after a restart, but this is not so bad, because I have the app ShellEx. But maybe it is possible to change a config file? Where is this located?

I have suggest very often, that SFOS should be have a bigger developer settings area with many settings for experts. Maybe is this also a categorie.

Thanks for all posts in advance and please do not close this question so early, because I saw that many users are interested on this.