make sure audio queue is cleared when transitioning between cards

https://anki.tenderapp.com/discussions/beta-testing/1846-anki-2122-beta#comment_48150139

qt/aqt/browser.py

@@ -1774,7 +1774,7 @@ where id in %s"""
                     audio = c.answer_av_tags()
                 av_player.play_tags(audio)
             else:
-                av_player.maybe_interrupt()
+                av_player.clear_queue_and_maybe_interrupt()
 
             txt = self.mw.prepare_card_text_for_display(txt)
             txt = gui_hooks.card_will_show(

qt/aqt/reviewer.py

@@ -191,7 +191,7 @@ The front of this card is empty. Please run Tools>Empty Cards."""
         if self.autoplay(c):
             av_player.play_tags(c.question_av_tags())
         else:
-            av_player.maybe_interrupt()
+            av_player.clear_queue_and_maybe_interrupt()
 
         # render & update bottom
         q = self._mungeQA(q)
@@ -236,7 +236,7 @@ The front of this card is empty. Please run Tools>Empty Cards."""
         if self.autoplay(c):
             av_player.play_tags(c.answer_av_tags())
         else:
-            av_player.maybe_interrupt()
+            av_player.clear_queue_and_maybe_interrupt()
 
         a = self._mungeQA(a)
         a = gui_hooks.card_will_show(a, c, "reviewAnswer")

qt/aqt/sound.py

@@ -93,15 +93,16 @@ class AVPlayer:
 
     def play_tags(self, tags: List[AVTag]) -> None:
         """Clear the existing queue, then start playing provided tags."""
+        self.clear_queue_and_maybe_interrupt()
         self._enqueued = tags[:]
-        self.maybe_interrupt()
         self._play_next_if_idle()
 
     def stop_and_clear_queue(self) -> None:
         self._enqueued = []
         self._stop_if_playing()
 
-    def maybe_interrupt(self) -> None:
+    def clear_queue_and_maybe_interrupt(self) -> None:
+        self._enqueued = []
         if self.interrupt_current_audio:
             self._stop_if_playing()