diff --git a/cwIoAudioMidi.cpp b/cwIoAudioMidi.cpp
index 39ab919..96324a3 100644
--- a/cwIoAudioMidi.cpp
+++ b/cwIoAudioMidi.cpp
@@ -978,6 +978,7 @@ cw::rc_t cw::io::audio_midi::main( const object_t* cfg )
 
   rc_t rc;
   app_t app = {};
+  bool asyncFl = true;
   
   if((rc = _parseCfg(&app,cfg)) != kOkRC )
     goto errLabel;
@@ -987,7 +988,7 @@ cw::rc_t cw::io::audio_midi::main( const object_t* cfg )
     return rc;
 
   // create the MIDI playback timer
-  if((rc = timerCreate( app.ioH, "am_timer", kAmMidiTimerId, app.midi_timer_period_micro_sec)) != kOkRC )
+  if((rc = timerCreate( app.ioH, "am_timer", kAmMidiTimerId, app.midi_timer_period_micro_sec, asyncFl)) != kOkRC )
   {
     cwLogError(rc,"Audio-MIDI timer create failed.");
     goto errLabel;
diff --git a/cwIoMidiRecordPlay.cpp b/cwIoMidiRecordPlay.cpp
index 1930456..e606cf8 100644
--- a/cwIoMidiRecordPlay.cpp
+++ b/cwIoMidiRecordPlay.cpp
@@ -1065,6 +1065,7 @@ namespace cw
 
 cw::rc_t cw::midi_record_play::create( handle_t& hRef, io::handle_t ioH, const object_t& cfg, event_callback_t cb, void* cb_arg )
 {
+  bool asyncFl = true;
   midi_record_play_t* p = nullptr;
   rc_t rc;
   
@@ -1113,7 +1114,7 @@ cw::rc_t cw::midi_record_play::create( handle_t& hRef, io::handle_t ioH, const o
   }
   
   // create the MIDI playback timer
-  if((rc = timerCreate( p->ioH, TIMER_LABEL, kMidiRecordPlayTimerId, p->midi_timer_period_micro_sec)) != kOkRC )
+  if((rc = timerCreate( p->ioH, TIMER_LABEL, kMidiRecordPlayTimerId, p->midi_timer_period_micro_sec, asyncFl)) != kOkRC )
   {
     cwLogError(rc,"Audio-MIDI timer create failed.");
     goto errLabel;
diff --git a/cwIoMinTest.cpp b/cwIoMinTest.cpp
index 83981c5..ba41c9c 100644
--- a/cwIoMinTest.cpp
+++ b/cwIoMinTest.cpp
@@ -88,18 +88,19 @@ cw::rc_t cw::min_test( const object_t* cfg )
   rc_t rc;
   app_t app = {};
 
+  bool asyncFl = true;
 
   // create the io framework instance
   if((rc = create(app.ioH,cfg,minTestCb,&app)) != kOkRC )
     return rc;
 
-  if((rc = threadCreate( app.ioH, kThread0Id, &app )) != kOkRC )
+  if((rc = threadCreate( app.ioH, kThread0Id, asyncFl, &app )) != kOkRC )
   {
     rc = cwLogError(rc,"Thread 0 create failed.");
     goto errLabel;    
   }
   
-  if((rc = threadCreate( app.ioH, kThread1Id, &app )) != kOkRC )
+  if((rc = threadCreate( app.ioH, kThread1Id, asyncFl, &app )) != kOkRC )
   {
     rc = cwLogError(rc,"Thread 1 create failed.");
     goto errLabel;