Update:
- I realized that playback with volumio3 and latest version of this plugin is actually a lot better on my JBL Flip 6 compared to volumio2 (version from #149). But still, depending on the source (podcast, local, spotify), playback on JBL Flip 6 was a bit choppy, while the old Bose Color SoundLink worked flawless.
- I was able to solve this issue for volumio3 by updating to the latest bluez-alsa. To do so, one has to change only two lines in the file “install.sh” inside “bluetooth-controller.zip”
old: git clone -b v3.1.0 https://github.com/Arkq/bluez-alsa.git
new: git clone -b v4.0.0 https://github.com/Arkq/bluez-alsa.git
old: ExecStart=/usr/bin/bluealsa --a2dp-force-audio-cd
new: ExecStart=/usr/bin/bluealsa --profile=a2dp-source
Now playback on the new device JBL Flip 6 is perfectly clear.