AudioChannel::phase1() no longer returns uInt8

the uInt8 is retreived with the new AudioChannel::volume() function

this separation is because we want to take the volume of the audio channel
every colour clock but 'phase 1' for the channel happens only twice
per scanline

src/emucore/tia/Audio.hxx

@@ -98,8 +98,8 @@ void Audio::tick()
 {
   // volume for each channel is sampled every color clock. the average of
   // these samples will be taken twice a scanline in the phase1() function
-  sumChannel0 += (uInt32)myChannel0.phase1();
-  sumChannel1 += (uInt32)myChannel1.phase1();
+  sumChannel0 += (uInt32)myChannel0.volume();
+  sumChannel1 += (uInt32)myChannel1.volume();
   sumCt++;
 
   switch (myCounter) {
@@ -111,7 +111,9 @@ void Audio::tick()
 
     case 37:
     case 149:
-      phase1();
+      myChannel0.phase1();
+      myChannel1.phase1();
+	  phase1();
       break;
 
     default:

src/emucore/tia/AudioChannel.cxx

@@ -77,7 +77,7 @@ void AudioChannel::phase0()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-uInt8 AudioChannel::phase1()
+void AudioChannel::phase1()
 {
   if (myClockEnable) {
     bool pulseFeedback = false;
@@ -118,7 +118,10 @@ uInt8 AudioChannel::phase1()
       }
     }
   }
+}
 
+uInt8 AudioChannel::volume() 
+{
   return (myPulseCounter & 0x01) * myAudv;
 }
 

src/emucore/tia/AudioChannel.hxx

@@ -30,7 +30,9 @@ class AudioChannel : public Serializable
 
     void phase0();
 
-    uInt8 phase1();
+    void phase1();
+
+	uInt8 volume();
 
     void audc(uInt8 value);