diff --git a/cmAudioPort.c b/cmAudioPort.c
index 17c32d3..68e9a7e 100644
--- a/cmAudioPort.c
+++ b/cmAudioPort.c
@@ -746,7 +746,8 @@ int cmApPortTest( bool runFl, cmRpt_t* rpt, int argc, const char* argv[] )
     if( r.inDevIdx != r.outDevIdx )
       cmApBufSetup( r.inDevIdx, r.srate, r.framesPerCycle, r.bufCnt, cmApDeviceChannelCount(r.inDevIdx,true), r.framesPerCycle, cmApDeviceChannelCount(r.inDevIdx,false), r.framesPerCycle, srateMult ); 
 
-    cmApBufEnableMeter(  r.inDevIdx, -1, kEnableApFl );
+    cmApBufEnableMeter(  r.inDevIdx,  -1, kEnableApFl | kInApFl );
+    cmApBufEnableMeter(  r.outDevIdx, -1, kEnableApFl | kOutApFl );
 
     // setup an output device
     if(cmApDeviceSetup(r.outDevIdx,r.srate,r.framesPerCycle,_cmApPortCb2,&r) != kOkApRC )