bluetooth choppy sound ubuntu 20.04 and 18.04

Earsistemas

Ubuntu 20.04 , Up Core Plus, I have followed all instrucctions from wiki pages (Up kernell and Wifi/BT firmware), but the sound is chopped all the time in the bluetooth devices. Using HDMI, sound output is ok.
I have tried PulseAudio latency offset, many pairings with differents bluetooth devices and all possible configurations, but always the same: it connects but the sound is choppy. The A2DP configuration is possible, but the HSP/HFP is not available. Please, any help will be wellcome. Thanks

DCleri

you should check the systemd service for the bluetooth and update the speed from 115200 to 3000000.

Specifically.

Stop and disable the service:
systemctl stop firmware-ampak-ap6355.service
systemctl disable firmware-ampak-ap6355.service

Go to /etc/systemd/system and edit the file: firmware-ampak-ap6355.service
And change the line:

ExecStart=/usr/bin/hciattach -n -t 10 /dev/ttyS6 bcm43xx 115200

to

ExecStart=/usr/bin/hciattach -n -t 10 /dev/ttyS6 bcm43xx 3000000

save, and reenable the service
systemctl enable firmware-ampak-ap6355.service
then restart

let us know if it works for you

Earsistemas

Thanks very much for your quick answer. Followed your instructions and... sound is ok now.