Bug fixes:

- make sure attribute error is thrown and handled when fluidsynth doesn't really load and leaves Synth attribute empty.
- fix error with start_note on OSCPlaybackImplementation when an extra parameter is an Envelope

scamp/_dependencies.py

@@ -31,19 +31,23 @@
         # load up a local copy of the fluidsynth dll on Windows or dylib on MacOS)
         logging.debug("Trying to load copy of pyfluidsynth from within SCAMP package.")
         from ._thirdparty import fluidsynth
+    # Sometimes fluidsynth seems to load, but it's empty and doesn't have the Synth attribute.
+    # this line will cause an AttributeError to be thrown and handled in that case
+    fluidsynth.Synth
     logging.debug("Loading of pyfluidsynth succeeded.")
 except (ImportError, AttributeError):
     logging.debug("Loading of pyfluidsynth failed.")
     try:
         if playback_settings.try_system_fluidsynth_first:
-            # second choice: use the use the local, tweaked copy of pyfluidsynth (which will also try to
+            # second choice: use the local, tweaked copy of pyfluidsynth (which will also try to
             # load up a local copy of the fluidsynth dll on Windows or dylib on MacOS)
             logging.debug("Trying to copy of pyfluidsynth from within SCAMP package.")
             from ._thirdparty import fluidsynth
         else:
             # second choice: import using an installed version of pyfluidsynth
             logging.debug("Trying to load system copy of pyfluidsynth.")
             import fluidsynth
+        fluidsynth.Synth  # See note above
         logging.debug("Loading of pyfluidsynth succeeded.")
     except (ImportError, AttributeError):
         # if we're here, it's probably because fluidsynth wasn't installed

scamp/_package_info.py

@@ -16,7 +16,7 @@
 
 name = "scamp"
 
-version = "0.9.1"
+version = "0.9.1.post4"
 
 author = "Marc Evanstein"
 

scamp/playback_implementations.py

@@ -527,7 +527,7 @@ def start_note(self, note_id: int, pitch: float, volume: float, properties: Note
                                  [note_id, pitch, volume])
         self._currently_playing.append(note_id)
         for param, value in properties.extra_playback_parameters.items():
-            self.change_note_parameter(note_id, param, value)
+            self.change_note_parameter(note_id, param, value.start_level() if hasattr(value, 'start_level') else value)
 
     def end_note(self, note_id: int) -> None:
         self.client.send_message("/{}/{}".format(self.message_prefix,