RArray<TInt> configParams;

// This setup converts audio to 16000Hz 16 bit mono PCM
configParams.Append(1); // stereo to mono switch (TRUE(1) or default FALSE(0))
configParams.Append(0); // decode left or right channel (1 left, 2 right, 0 default all)
configParams.Append(1); // decimation factor (2, 4 or default 1)
configParams.Append(1); // error concealment level (0 none, default 1)
configParams.Append(16); // resolution of PCM samples (default 16 bits)
configParams.Append(16000); //Output sampling frequency

TUid codecId = TUid::Uid(KMmfUidControllerAudio);
iOCodec2->ConfigureL(codecId, (TDesC8&) configParams);