diff --git a/birdnet-pi/rootfs/etc/cont-init.d/99-run.sh b/birdnet-pi/rootfs/etc/cont-init.d/99-run.sh
index 87881ce25..09fed572f 100755
--- a/birdnet-pi/rootfs/etc/cont-init.d/99-run.sh
+++ b/birdnet-pi/rootfs/etc/cont-init.d/99-run.sh
@@ -64,6 +64,11 @@ if [ -n "${ALSA_CARD:-}" ]; then
     done
 fi
 
+# Define permissions for audio
+AUDIO_GID=$(stat -c %g /dev/snd/* | head -n1) && \
+( groupmod -o -g "$AUDIO_GID" audio 2>/dev/null || groupadd -o -g "$AUDIO_GID" audio || true ) && \
+usermod -aG audio "${USER:-pi}" || true
+
 # Fix timezone as per installer
 CURRENT_TIMEZONE="$(timedatectl show --value --property=Timezone)"
 [ -f /etc/timezone ] && echo "$CURRENT_TIMEZONE" | sudo tee /etc/timezone > /dev/null