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I just installed herstluftwm on my debian machine and configured some stuff when my friends called me on discord. I was listening to music and the sound quality dropped drastically when I joined the call. I was checking bluetoothctl and noticed that the headphones switched to "idle" mode when joining the call. Before joining the call:

[CHG] Transport /org/bluez/hci0/dev_AC_12_2F_E4_A6_A4/sep1/fd0 State: active

After joining the call:

[CHG] Transport /org/bluez/hci0/dev_AC_12_2F_E4_A6_A4/sep1/fd0 State: active

And when I left it went back to "active". Does anybody has an idea why this happens? I also restarted the bluetooth service, re-connected and re-paired the headphones.

Edit: I forgot to mention that I also use a separate microphone so it would be no problem if the mic from the headphone does not work.

Giacomo1968
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Joda
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    Bluetooth Hands-free Profile sucks. Buy a gaming headset with proprietary wireless instead. – Daniel B Dec 22 '23 at 20:59
  • @DanielB I have a really good gaming headset but the sound just isn't as good as the sound from my headphones. – Joda Dec 22 '23 at 21:08
  • Bluetooth sucks the moment you use it for calls rather than just audio output. Either use a separate microphone or a proper headset. – Mokubai Dec 22 '23 at 21:09
  • Does anybody has an idea why this happens? Pretty much everybody that has been using Bluetooth audio for the past 20 years or about. – ChanganAuto Dec 22 '23 at 21:13
  • @Mokubai Forgot to mention, I got a separate microphone and in discord it is selected as input. – Joda Dec 22 '23 at 21:23
  • If the headset microphone truly was not activated (this is the trigger), your sound quality would not degrade. Make double-check to make sure everything is set up correctly. (Maybe the output device is relevant, too?) – Daniel B Dec 22 '23 at 21:35
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    @Joda then discord or something else in your operating system is badly written and opens all microphone devices and thus switches your headset into handsfree mode. Try some other applications, if they work for using a different microphone while giving good quality audio then you know that discord is the problem. – Mokubai Dec 22 '23 at 21:37
  • @Mokubai that was a good point. Just tested it and it is the same with every app that is accessing my mic, but I am sure that there is a solution, its just not found yet. – Joda Dec 22 '23 at 21:45
  • https://askubuntu.com/questions/1205749/how-permanently-remove-or-disable-hsp-hfp-bluetooth-profile – Mokubai Dec 22 '23 at 21:48
  • @Mokubai I really appreciate your help but what is said in the article actually made it worse... my whole audio now sounds like when I was joining a discord call, it is horrible. – Joda Dec 22 '23 at 22:25
  • Not an article but a Q&A in a sister site. It has multiple answers. Which one you tried exactly? – ChanganAuto Dec 22 '23 at 22:32
  • @ChanganAuto The first and the second one, also both together and between the steps I always restarted the services. – Joda Dec 22 '23 at 22:37

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