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Notes for pulseaudio based setup for the Sony WH-100XM2.  Current Linux distros use pipewire.

===== Fedora <=33 / pulseaudio based setups =====
<code>
# Let's install the required packages.  Pulls in pulseaudio.
# Before these codecs became available, package 
# pulseaudio-module-bluetooth got installed instead.
$ sudo dnf install pulseaudio-module-bluetooth-freeworld
  
# Now restart pulseaudio.  Typically, one daemon is running
# on your system.  Execute the following as user, not root.
$ killall pulseaudio
$ pulseaudio --start

$ sudo systemctl status bluetooth.service

$ sudo bluetoothctl
[bluetooth]# power on
[bluetooth]# agent on
[bluetooth]# default-agent
[bluetooth]# scan on
[NEW] Device XX:XX:XX:XX:XX:XX WH-1000XM2
[bluetooth]# scan off
[bluetooth]# trust XX:XX:XX:XX:XX:XX
[bluetooth]# pair XX:XX:XX:XX:XX:XX
Attempting to pair with XX:XX:XX:XX:XX:XX
[CHG] Device XX:XX:XX:XX:XX:XX Connected: yes
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: ... 
[CHG] Device XX:XX:XX:XX:XX:XX UUIDs: ... 
[CHG] Device XX:XX:XX:XX:XX:XX Paired: yes
Pairing successful
[CHG] Device XX:XX:XX:XX:XX:XX Connected: no
[bluetooth]# connect XX:XX:XX:XX:XX:XX
Attempting to connect to XX:XX:XX:XX:XX:XX
[CHG] Device XX:XX:XX:XX:XX:XX Connected: yes
Connection successful
[bluetooth]# quit

### Which codec is currently active?
CARDINDEX=$(pacmd list-cards | grep index|tail -1|awk '{print $2}')
echo $CARDINDEX

### Try to set a2dp codec/for good quality audio 
pacmd set-card-profile $CARDINDEX a2dp_sink

### Try to set h2h profile, for having also microphone usable
pacmd set-card-profile $CARDINDEX headset_head_unit

### Verify active profile
pacmd list-cards|grep active|tail -1
</code>
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