diff --git a/mise/conf.d/pipewire.toml b/mise/conf.d/pipewire.toml
index 732044c5..6e44f6a7 100644
--- a/mise/conf.d/pipewire.toml
+++ b/mise/conf.d/pipewire.toml
@@ -1,5 +1,6 @@
 [dotfiles]
 "~/.config/pipewire/pipewire.conf.d/50-no-raop.conf" = "../../pipewire/50-no-raop.conf"
+"~/.config/wireplumber/wireplumber.conf.d/51-bluez-aptx-hd.conf" = "../../wireplumber/51-bluez-aptx-hd.conf"
 
 [bootstrap.packages]
 "dnf:pipewire-codec-aptx" = "latest"
diff --git a/wireplumber/51-bluez-aptx-hd.conf b/wireplumber/51-bluez-aptx-hd.conf
new file mode 100644
index 00000000..dad369d2
--- /dev/null
+++ b/wireplumber/51-bluez-aptx-hd.conf
@@ -0,0 +1,18 @@
+# Keep Bluetooth audio on aptX HD and never fall back to the mono headset profile.
+#
+# WirePlumber's "autoswitch to headset profile" moves a Bluetooth card to
+# HSP/HFP (mono, narrowband) as soon as an application opens the headset
+# microphone, and it does not reliably switch back afterwards. Turning it off
+# also stops the headset microphone from being published, so a connected
+# headset only ever offers its stereo sink.
+wireplumber.settings = {
+  bluetooth.autoswitch-to-headset-profile = false
+}
+
+monitor.bluez.properties = {
+  # A2DP: aptX HD only, so nothing negotiates down to AAC or plain aptX.
+  # SBC stays available as the mandatory fallback codec.
+  # HFP: keep mSBC for the headset profile, in case it is ever selected by hand.
+  # Applies to every audio device on hci0.
+  bluez5.codecs = [ aptx_hd msbc ]
+}