diff --git a/pysollib/actions.py b/pysollib/actions.py
index ce7a9d81..cc5ffe5d 100644
--- a/pysollib/actions.py
+++ b/pysollib/actions.py
@@ -911,6 +911,7 @@ class PysolMenubar(PysolMenubarTk):
         self.top.screenshot(fn)
 
     def mPlayNextMusic(self, *args):
+        print("mPlayNextMusic", flush=True)
         if self._cancelDrag(break_pause=False):
             return
         if (self.app.audio and self.app.opt.music and
diff --git a/pysollib/app.py b/pysollib/app.py
index 3ddb1650..7be8fde5 100644
--- a/pysollib/app.py
+++ b/pysollib/app.py
@@ -130,6 +130,7 @@ class Application:
         self.tabletile_index = 0        # current table tile
         self.sample_manager = SampleManager()
         self.music_manager = MusicManager()
+        print('MusicManager = ', self.music_manager, flush=True)
         self.music_playlist = []
         self.intro = Struct(
             progress=None,            # progress bar
diff --git a/pysollib/pysolaudio.py b/pysollib/pysolaudio.py
index 93b681fb..75f78dae 100644
--- a/pysollib/pysolaudio.py
+++ b/pysollib/pysolaudio.py
@@ -500,6 +500,7 @@ class PyGameAudioClient(AbstractAudioClient):
     CAN_PLAY_MUSIC = True
 
     def __init__(self):
+        print("print PyGameAudioClient", flush=True)
         AbstractAudioClient.__init__(self)
         import pygame.mixer
         import pygame.mixer_music