Rearrange things a bit in case the buffer size is dependent on the stream format--it doesn't appear to be but you never know.

stepmania/src/arch/Sound/RageSoundDriver_CA.cpp

@@ -86,38 +86,10 @@ RageSound_CA::RageSound_CA()
     {
         RageException::ThrowNonfatal("Couldn't create default output device.");
     }
+    
     AudioStreamID sID = mOutputDevice->GetStreamByIndex( kAudioDeviceSectionOutput, 0 );
     CAAudioHardwareStream stream( sID );
-    try
-    {
-        UInt32 frames = mOutputDevice->GetLatency(kAudioDeviceSectionOutput);
-        if (stream.HasProperty(0, kAudioDevicePropertyLatency))
-        {
-            UInt32 t, size = 4;
 
-            stream.GetPropertyData(0, kAudioDevicePropertyLatency, size, &t);
-            frames += t;
-        }
-        else
-            LOG->Warn("Stream reports no latency.");
-        mLatency = frames / 44100.0;
-        LOG->Info("Frames of latency:  %lu\n"
-                  "Seconds of latency: %f", frames, mLatency);
-    }
-    catch (const CAException& e)
-    {
-        delete mOutputDevice;
-        RageException::ThrowNonfatal("Couldn't get Latency.");
-    }
-    try
-    {
-        UInt32 bufferSize = mOutputDevice->GetIOBufferSize();
-        LOG->Info("I/O Buffer size: %lu", bufferSize);
-    }
-    catch (const CAException& e)
-    {
-        LOG->Warn("Could not determine buffer size.");
-    }
     try
     {
         mOutputDevice->AddPropertyListener(kAudioPropertyWildcardChannel,
@@ -162,6 +134,41 @@ RageSound_CA::RageSound_CA()
     const Desc& procFormat = FindClosestFormat( procFormats );
     stream.SetCurrentIOProcFormat( procFormat );
     
+    
+    try
+    {
+        UInt32 bufferSize = mOutputDevice->GetIOBufferSize();
+        LOG->Info("I/O Buffer size: %lu", bufferSize);
+    }
+    catch (const CAException& e)
+    {
+        LOG->Warn("Could not determine buffer size.");
+    }    
+    
+    try
+    {
+        UInt32 frames = mOutputDevice->GetLatency(kAudioDeviceSectionOutput);
+        if (stream.HasProperty(0, kAudioDevicePropertyLatency))
+        {
+            UInt32 t, size = 4;
+            
+            stream.GetPropertyData(0, kAudioDevicePropertyLatency, size, &t);
+            frames += t;
+            LOG->Info("Frames of stream latency: %lu", t);
+        }
+        else
+            LOG->Warn("Stream reports no latency.");
+        mLatency = frames / 44100.0;
+        LOG->Info("Frames of latency:        %lu\n"
+                  "Seconds of latency:       %f", frames, mLatency);
+    }
+    catch (const CAException& e)
+    {
+        delete mOutputDevice;
+        RageException::ThrowNonfatal("Couldn't get Latency.");
+    }
+    
+
 	StartDecodeThread();
 
     gConverter = new AudioConverter( this, procFormat );