Limited effective range of sink volume

[hmorris94]

I am using my Android 10 phone to sink audio and only the very low end of the volume slider has an impact (roughly the first 10%, as if this module has a maximum of 10 and rounds 11-100 down). Under iOS, it's binary; anything above zero is effectively maximum volume. The behavior in the absolute_volume branch is the same.

In the case of Android, the same behavior occurs using both the aptX HD and SBC profiles.

[EHfive]

Because sink (transfer audio from cellphone to pc ) absolute volume is not implemented in this module.

You have to manually disable absolute volume in your Android/IOS devices.

[hmorris94]

Would the issue not have gone away using the absolute_volume branch? Disabling that feature is not necessarily an option on COTS devices - certainly not the ones I've tried, unfortunately.

[EHfive]

Would the issue not have gone away using the absolute_volume branch?

No. It's only activated when transfer audio data from PC/Pulseaudio.

[hmorris94]

I see. Looking at Bluetooth HCI logs, you're right about absolute volume.

In contrast to the previous absolute volume issue, I think this fits mainline as sink volume control ties directly to Pulse and not device support. Where would one look towards adding this functionality?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[hmorris94]

Fighting stale bot.

[EHfive]

I would try to add an option which allows setting initial device volume gain.

Or merge https://github.com/EHfive/pulseaudio-modules-bt/tree/absolute_volume but with some modifications if I got free times.

[slgray]

Have same low volume issue on Airpods too, unfortunately Airpods do not have "button" to control the internal volume.

[EHfive]

This project has been deprecated. #154

I would try proposing a fix for this on PipeWire.