Not sure I really understand what he's on about (his English isn't very good), but you also need to read the subsequent replies from IQ-Audio. Remember also that I'm not using the Hi-Fi Berry interface.

All I know is that I've got two superb sounding 'conventional' music sources (CDP and T/T), and in my system, the Pi/DAC, fed with appropriate quality recordings, can compete at their performance level - and I'm not alone in feeling that way, as others I know with similar quality equipment have reached the same conclusions.

I don't rave about something for nothing!

Marco.