Yes, it converted very fast, but when I tried to play the resulting file on any soft player that supports LPCM playback like Daum PotPlayer or VLC, I got no playback with error messages "not recognized", etc. I tried latest FFPlay, and its gives "Invalid data found when processing input". FFMpeg -i gives the same error. So something is probably wrong with the file's header?
I tried to transcode resulting 5.1 LPCM to 5.1 ALAC using dbpowerAMP Converter, and it transcoded to 2-channel file that plays at very slow rate on PC Audio Players, meaning the source LPCM file was ID'd incorrectly. At the same time, I imported the LPCM file as Raw into Audacity and it plays correctly as 5.1, so obviously the header might be a problem, since Audacity probably ignores any headers in Raw. The same issue with resulting header error was mentioned here, so this is something only you can fix.
Also, what media info tool can decipher media info from multichannel LPCM file? I tried MediaInfo and Gspot with no success, possibly due to header error. May you suggest any soft player that works fine with 5.1 LPCM files transcoded from Flac with eac3to?
If transcoded by eac3to file does not contain any header, then the guy who posted on VideoHelp meant that was probably different from standard LPCM output? I did not post that remark either, he did from personal experience. But you didn't answer my above detail questions here (and they don't violate your forum rules), why none of soft players can play or recognize a multichannel LPCM file transcoded with eac3to from Flac?