diff --git a/cwAudioDevice.h b/cwAudioDevice.h
index b8619fd..a7ab5ea 100644
--- a/cwAudioDevice.h
+++ b/cwAudioDevice.h
@@ -62,7 +62,6 @@ namespace cw
         rc_t        (*deviceStart)(          struct driver_str* drvArg, unsigned devIdx );
         rc_t        (*deviceStop)(           struct driver_str* drvArg, unsigned devIdx );
         bool        (*deviceIsStarted)(      struct driver_str* drvArg, unsigned devIdx );
-        bool        (*deviceIsAsync)(        struct driver_str* drvArg, unsigned devIdx );
         rc_t        (*deviceExecute)(        struct driver_str* drvArg, unsigned devIdx );
         void        (*deviceRealTimeReport)( struct driver_str* drvArg, unsigned devIdx );          
       } driver_t;          
diff --git a/cwAudioDeviceAlsa.cpp b/cwAudioDeviceAlsa.cpp
index 0043fed..032fea5 100644
--- a/cwAudioDeviceAlsa.cpp
+++ b/cwAudioDeviceAlsa.cpp
@@ -1375,7 +1375,6 @@ cw::rc_t cw::audio::device::alsa::create( handle_t& hRef, struct driver_str*& dr
     p->driver.deviceStart          = deviceStart;
     p->driver.deviceStop           = deviceStop;
     p->driver.deviceIsStarted      = deviceIsStarted;
-    p->driver.deviceIsAsync        = deviceIsAsync;
     p->driver.deviceExecute        = deviceExecute;
     
     p->driver.deviceRealTimeReport = deviceRealTimeReport;
@@ -1584,11 +1583,6 @@ bool  cw::audio::device::alsa::deviceIsStarted(struct driver_str* drv, unsigned
   
 }
 
-bool  cw::audio::device::alsa::deviceIsAsync(struct driver_str* drv, unsigned devIdx )
-{
-  return true;
-}
-
 cw::rc_t  cw::audio::device::alsa::deviceExecute(struct driver_str* drv, unsigned devIdx )
 {
   return kOkRC;
diff --git a/cwAudioDeviceAlsa.h b/cwAudioDeviceAlsa.h
index d40d0fe..7dd10cb 100644
--- a/cwAudioDeviceAlsa.h
+++ b/cwAudioDeviceAlsa.h
@@ -24,7 +24,6 @@ namespace cw
         rc_t        deviceStart(          struct driver_str* drv, unsigned devIdx );
         rc_t        deviceStop(           struct driver_str* drv, unsigned devIdx );
         bool        deviceIsStarted(      struct driver_str* drv, unsigned devIdx );
-        bool        deviceIsAsync(        struct driver_str* drv, unsigned devIdx );
         rc_t        deviceExecute(        struct driver_str* drv, unsigned devIdx );        
         void        deviceRealTimeReport( struct driver_str* drv, unsigned devIdx );