--- a/dom/media/AudioConverter.h
+++ b/dom/media/AudioConverter.h
@@ -133,16 +133,19 @@ public:
     return Process(aBuffer, aBuffer, aSamples * AudioConfig::SampleSize(mIn.Format()));
   }
   bool CanWorkInPlace() const;
   bool CanReorderAudio() const
   {
     return mIn.Layout().MappingTable(mOut.Layout());
   }
 
+  const AudioConfig& InputConfig() const { return mIn; }
+  const AudioConfig& OutputConfig() const { return mOut; }
+
 private:
   const AudioConfig mIn;
   const AudioConfig mOut;
   uint8_t mChannelOrderMap[MAX_AUDIO_CHANNELS];
   /**
    * Process
    * Parameters:
    * aOut  : destination buffer where converted samples will be copied