ugh

pi/asound.conf

@@ -1,45 +1,11 @@
 # Use the Google Voice HAT soundcard as index 0 (primary card)
 options snd_rpi_googlevoicehat_soundcard index=0
 
-# Define a soft volume control for the speaker (Playback)
-pcm.softvol {
-    type softvol
-    slave.pcm "dmix"           # route through dmix for mixing
-    control {
-        name "Master"         # name of volume control
-        card 0
-    }
-}
-
-# Shareable mic capture on the Google Voice HAT (card 0)
-pcm.micdup {
-    type dsnoop
-    ipc_key 2048
-    slave {
-        pcm "hw:0,0"
-        channels 1
-        rate 16000
-    }
-}
-
-# Define a software volume (gain) for the microphone (Capture)
-pcm.micboost {
-    type softvol
-    slave.pcm "micdup"        # route through dsnoop wrapper
-    control {
-        name "Micro"          # name of mic gain control
-        card 0
-    }
-    min_dB -10.0
-    max_dB 50.0
-    resolution 256
-}
-
-# Set default devices to use the above for asymmetrical playback/capture
+# Simple defaults: direct playback/capture on card 0
 pcm.!default {
     type asym
-    playback.pcm "plug:softvol"
-    capture.pcm "plug:micboost"
+    playback.pcm "plughw:0,0"
+    capture.pcm "plughw:0,0"
 }
 
 ctl.!default {

pi/install_roverd.sh

@@ -152,6 +152,15 @@ install_audio_support() {
 	if ! boot_config="$(find_boot_config)"; then
 		log "WARNING: unable to locate /boot config.txt; please enable googlevoicehat-soundcard overlay manually"
 	else
+		# Ensure onboard audio is disabled (prevents card index flapping)
+		if grep -Eq '^\s*dtparam=audio=on\b' "$boot_config"; then
+			log "Disabling onboard audio (dtparam=audio=on -> off) in $boot_config"
+			sed -i 's/^\s*dtparam=audio=on\b/# roverd disabled onboard audio\ndtparam=audio=off/' "$boot_config"
+		fi
+		if ! grep -Eq '^\s*dtparam=audio=off\b' "$boot_config"; then
+			log "Adding dtparam=audio=off to $boot_config"
+			echo "dtparam=audio=off" >> "$boot_config"
+		fi
 		if ! grep -Eq '^\s*dtoverlay=googlevoicehat-soundcard\b' "$boot_config"; then
 			local backup="${boot_config}.roverd.$(date +%Y%m%d%H%M%S).bak"
 			cp "$boot_config" "$backup"
@@ -159,7 +168,6 @@ install_audio_support() {
 				echo ""
 				echo "# Added by roverd installer to enable Google AIY v1 sound card"
 				echo "dtoverlay=googlevoicehat-soundcard"
-				echo "dtparam=audio=off"
 			} >> "$boot_config"
 			log "Enabled googlevoicehat-soundcard overlay in $boot_config (backup at $backup). Reboot required."
 		else