Try it with "cat /proc/asound/cards" there you will find out if the card is installed and which number it has and then edit in "/usr/share/alsa/alsa.conf" the settings defaults.ctl.card <name/number of your sound device> defaults.pcm.card <name/number of your sound device> defaults.timer.card <name/number of your sound device> im not an expert so try this NOT with your main recalbox sd card and give me feedback
