Revert "don't send or parse attenuation for now"

This reverts commit 1767f2b052.

interface/src/Audio.cpp

@@ -158,6 +158,9 @@ int audioCallback (const void *inputBuffer,
                 currentPacketPtr += sizeof(float);
             }
             
+            // tell the mixer not to add additional attenuation to our source
+            *(currentPacketPtr++) = 255;
+            
             // memcpy the corrected render yaw
             float correctedYaw = fmodf(data->linkedHead->getRenderYaw(), 360);
             

shared/src/AudioRingBuffer.cpp

@@ -117,6 +117,9 @@ void AudioRingBuffer::parseData(void *data, int size) {
             dataPtr += sizeof(float);
         }
         
+        unsigned int attenuationByte = *(dataPtr++);
+        attenuationRatio = attenuationByte / 255.0f;
+        
         memcpy(&bearing, dataPtr, sizeof(float));
         dataPtr += sizeof(float);