Bluetooth Volume is uneffected by changing the variable

[SteveLambert]

I wanted to lower the bluetooth volume, searched and found this:

Balena on RaspberryPi 3. Lower Bluetooth connection Volume

I got Bluetooth sound working with the Hifiberry Amp+ using the variable of “hifiberry-dacplus” suggested by Toby. The Hifiberry Amp+ is a stand alone Amp Hat for the Raspberry Pi, and there is not a physical volume adjustment knob. The only current issue is that the Bluetooth connection sound is way louder than I’d like. Can it be lowered? It does not appear to be related to the volume of my phone/device connecting to the balena/RPi.

I tried the same thing suggested in the thread, but the sound level is unaffected. I even set SYSTEM_OUTPUT_VOLUME to 0 just to be sure.

Also CONNECTION_NOTIFY_VOLUME is at 15 and I’m not hearing anything.

I’m connecting from an iPhone over bluetooth and airplay. Airplay is fine and i get volume controls. Bluetooth is louder and slightly clipping.

I’m using balenaOS 2.54.2+rev1 on a Pi Zero W

I’m using the Pimoroni PHATDAC on this one, also if that’s helpful.

What am I missing?

[tmigone]

Hi Steve, the environment variables SYSTEM_OUTPUT_VOLUME and CONNECTION_NOTIFY_VOLUME have been deprecated as of version 3.0 of balenaSound. What you are looking for is the env var SOUND_VOLUME, see here for more details.

Also, slightly related to your problem, there is an open issue currently where you cannot control bluetooth volume from your smartphone.

[myarmolinsky]

Hello,
I just want to inform you that the aforementioned issue that prevented controlling bluetooth volume from your smartphone has been resolved. If you were still experiencing the issue after switching to the non-deprecated environment variable, could you please try updating to version 3.8.0 or higher to see if that resolves your issue?