Apparently the MDS HSR-5 HDMI board's firmware is being updated.
AIF is "Audio Interchange File Format (AIFF). The file extension for the standard AIFF format is .aiff or .aif." according to wiki
. Not sure what sort of noise was the issue, as AIFF files are just like PCM wav. files regarding audio.
Now I have a question. >>Added option to generate an LFE [sic] channel when using Neo:X with a 2-channel input source.<< If anything, it generates a subwoofer channel. But nevermind. I am wondering why it needs this separate mode in order to do so. Presumably, if bass management is active in the RS-20i, any and all signals will be covered, regardless of whether they are stereo, 5.0, 7.1, or upmixed by Neo:X. So what does this mode do that was not happening already?