Bluetooth call volume is too low

NYCAR

Senior Member
Apr 22, 2015
95
6
0
I rarely make calls in my car, so I do not know if this was much of an issue on my older head unit*, or if it was a symptom prior to root.

I have a new unit from Pumpkin - MTC8-KLD6-V2.81
Rooted with Malaysk's latest ROM

My phone (HTC M8) is connected through bluetooth. Music plays just fine through the system.

When I make a call, however;
1) Music Stops and head unit goes silent (not a problem)
2) I hear a bit of static (I have had low volume static since I upgraded to Malaysk if the head unit is on and nothing is playing)(again, not really a problem)
3) Phone starts to make a call.
4) Static suddenly goes away, as if the volume was suddenly turned down
5) I can barely hear the phone ring through the head unit.

I have tried turning up the volume all the way on the phone (volume on the phone seems to do nothing when in a bluetooth call) and turning up the head unit. If I have the head unit all the way up, I CAN hear reasonably well, but that's at a volume of 30 when everything else plays loud enough at 5.

I have looked for different setting on the phone and on the head unit and have found nothing. I have adjusted the Factory Settings -> Audio, but that changes bluetooth as a whole and make the music play too loud.

I would say that the issue is is similar to switching the phone from "regular" (where 1-10 is set for being near one's ear) to "speaker" (where 1-10 can be heard across the room) and the phone is telling the head unit to stay at "regular".

Actually, on my first head unit the problem was just the opposite and phone calls were always way too loud.

Anyone have ideas on other settings I should try?
Thanks
 

NYCAR

Senior Member
Apr 22, 2015
95
6
0
I think there are options in the factory settings are for individual volume controls.
There are, but the option is for "Bluetooth" in general.

Bluetooth itself is fine, and I can listen to music from my phone through Bluetooth at whatever level I choose. The problem is that when it switches to phone (dialing out or coming in) the volume drops drastically and I have to turn the head unit's volume up all the way to hear at all. That means the music from Bluetooth will come back at speaker (or at least ear) damaging levels once the call ends.