I have a pair of bluetooth headphones so I ended up installing bluealsa. From Raspbian debs but it's at https://github.com/Arkq/bluez-alsa I made up this asoundrc file, which works pcm.buds { # works type plug slave { pcm { type bluealsa device FE:46:6D:40:FC:43 # mac from bluetoothctl profile "a2dp" # defined by bluealsa } } hint { # not essential show on description "BT earbuds" } } I can play wave files like: aplay -D buds brown.wav The catch is I want to use them with Audacity, and probably other things. So it would be simplest if I could set bluealsa as the default audio out device and change it back when I'm done. Except the directions at https://www.alsa-project.org/main/index.php/Setting_the_default_device expect you to set it to a card number. Audacity checks asoundrc when starting up and gives this error if I have either bluealsa or buds in there. Comment it out and I'm back to HDMI sound, all is fine. bluealsa doesn't emulate a card apparently, it's not in cat /proc/asound/cards Reading the asoundrc literally it's a pcm type. Audacity's list has just upmix, vdownmix, dmix for devices. I can edit audacity.cfg and put buds in as PlaybackDevice but it plays a half-hour recording i 26 seconds. I do hear it in the earbuds, the sample rate is just running flat-out or something. If I set PlaybackDevice to bluealsa it plays through the HDMI sound.
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