bluetooth choppy sound ubuntu 20.04 and 18.04

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
Comments
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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.serviceGo 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 restartlet us know if it works for you
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Thanks very much for your quick answer. Followed your instructions and... sound is ok now.
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