(service alsa-service-type
(alsa-configuration
  (pulseaudio? #f)
  (extra-options #~(string-append "\
pcm_type.bluealsa {
  lib \"" #$(file-append bluez-alsa "/lib/alsa-lib/libasound_module_pcm_bluealsa.so") "\"
}
ctl_type.bluealsa {
  lib \"" #$(file-append bluez-alsa "/lib/alsa-lib/libasound_module_ctl_bluealsa.so") "\"
}

pcm.cinebar {
    type bluealsa
    device \"6C:5A:B5:A4:AA:CD\" # Cinebar
    profile \"a2dp\"
}

ctl.cinebar {
  type bluealsa
}

pcm.default cinebar
ctl.default cinebar
"))))

Generated by Ricardo Wurmus using scpaste at Fri Jan 8 17:38:31 2021. CET. (original)