* The A2DP sink option? That is a bluetooth feature that allows for high quality audio playback on bluetooth headsets. https://wiki.archlinux.org/index.php/Bluetooth_headset#Switch_between_HSP/HFP_and_A2DP_setting The output of `guix system describe` ``` nonguix: repository URL: https://gitlab.com/nonguix/nonguix branch: master commit: ]8;;https://gitlab.com/nonguix/nonguix/commit/0a0e8d0db63210d45f79196769dfda9f2b2355dd\0a0e8d0db63210d45f79196769dfda9f2b2355dd]8;;\ guix: repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: ]8;;https://git.savannah.gnu.org/cgit/guix.git/commit/?id=09c05fde523f3186d9e12ce3310139ecb69b78d7\09c05fde523f3186d9e12ce3310139ecb69b78d7]8;;\ configuration file: ]8;;file://ninshubur/gnu/store/rz12j1r5f48wx1qh3d4mxxcy4irz6mk7-configuration.scm\/gnu/store/rz12j1r5f48wx1qh3d4mxxcy4irz6mk7-configuration.scm]8;;\ ``` My guix configuration (with redactions) is attached: