I have problem with playing multichannel audio files. The output is set to RAW, but the to the receiver goes only 2-channel signal.
I have tried with multichannel AAC, FLAC, WMV etc.. WavPack can't play at all. On the other hand movies with DTS and Dolby digital are playing excellent 5.1 sound through Digital Out.
The receiver is Harman Kardon AVR 3000(without HDMI support).
The chip is Realtek RTD1055.