Fix (workaround) volume going to zero after track starts

app/music.py

@@ -130,7 +130,7 @@ class Music:
 
         return status
 
-    def set_volume(self, volume, set_default=True):
+    def set_volume(self, volume=None, set_default=True):
         """Set maximum volume used for player"""
 
         if not self.player:
@@ -139,6 +139,9 @@ class Music:
         if set_default:
             self.max_volume = volume
 
+        if volume is None:
+            volume = Config.VOLUME_VLC_DEFAULT
+
         self.player.audio_set_volume(volume)
 
     def stop(self) -> float:

app/musicmuster.py

@@ -301,6 +301,29 @@ class Window(QMainWindow, Ui_MainWindow):
         self.timer.start(Config.TIMER_MS)
         self.connect_signals_slots()
 
+    def about(self) -> None:
+        """Get git tag and database name"""
+
+        try:
+            git_tag = str(
+                subprocess.check_output(
+                    ['git', 'describe'], stderr=subprocess.STDOUT
+                )
+            ).strip('\'b\\n')
+        except subprocess.CalledProcessError as exc_info:
+            git_tag = str(exc_info.output)
+
+        with Session() as session:
+            if session.bind:
+                dbname = session.bind.engine.url.database
+
+        QMessageBox.information(
+            self,
+            "About",
+            f"MusicMuster {git_tag}\n\nDatabase: {dbname}",
+            QMessageBox.StandardButton.Ok
+        )
+
     def cart_configure(self, cart: Carts, btn: CartButton) -> None:
         """Configure button with cart data"""
 
@@ -821,29 +844,6 @@ class Window(QMainWindow, Ui_MainWindow):
 
         self.stop_playing(fade=True)
 
-    def about(self) -> None:
-        """Get git tag and database name"""
-
-        try:
-            git_tag = str(
-                subprocess.check_output(
-                    ['git', 'describe'], stderr=subprocess.STDOUT
-                )
-            ).strip('\'b\\n')
-        except subprocess.CalledProcessError as exc_info:
-            git_tag = str(exc_info.output)
-
-        with Session() as session:
-            if session.bind:
-                dbname = session.bind.engine.url.database
-
-        QMessageBox.information(
-            self,
-            "About",
-            f"MusicMuster {git_tag}\n\nDatabase: {dbname}",
-            QMessageBox.StandardButton.Ok
-        )
-
     def get_one_track(self, session: scoped_session) -> Optional[Tracks]:
         """Show dialog box to select one track and return it to caller"""
 
@@ -1234,6 +1234,18 @@ class Window(QMainWindow, Ui_MainWindow):
             # Play (new) current track
             self.current_track.start()
             self.music.play(self.current_track.path, position)
+            # For as-yet unknown reasons. sometimes the volume gets
+            # reset to zero within 200mS or so of starting play. This
+            # only happened since moving to Debian 12, which uses
+            # Pipewire for sound (which may be irrelevant).
+            for _ in range(3):
+                if self.music.player:
+                    volume = self.music.player.audio_get_volume()
+                    if volume < 10:
+                        self.music.set_volume()
+                        log.error(f"Reset from {volume=}")
+                        break
+                sleep(0.1)
 
             # Tell database to record it as played
             Playdates(session, self.current_track.track_id)