Extensive changes to improve NoteTrack display and (some) editing, NoteTrack playback via MIDI, and Midi-to-Audio alignment.

lib-src/portmidi/porttime/ptmacosx_mach.c

@@ -63,7 +63,7 @@ static void *Pt_CallbackProc(void *p)
         /* wait for a multiple of resolution ms */
         UInt64 wait_time;
         int delay = mytime++ * parameters->resolution - Pt_Time();
-	long timestamp;
+	PtTimestamp timestamp;
         if (delay < 0) delay = 0;
         wait_time = AudioConvertNanosToHostTime((UInt64)delay * NSEC_PER_MSEC);
         wait_time += AudioGetCurrentHostTime();
@@ -104,6 +104,7 @@ PtError Pt_Stop()
 {
     /* printf("Pt_Stop called\n"); */
     pt_callback_proc_id++;
+    pthread_join(pt_thread_pid, NULL);
     time_started_flag = FALSE;
     return ptNoError;
 }
@@ -124,7 +125,7 @@ PtTimestamp Pt_Time()
 }
 
 
-void Pt_Sleep(long duration)
+void Pt_Sleep(int32_t duration)
 {
     usleep(duration * 1000);
 }