Is there a LPCM ripping tool analogous to PPCMRipper, for grabbing LPCM from non-copy-protected DVD-Audio discs?

I'm not too sure what you're asking for, but there is a tool called "DVD-A Explorer" that I used to rip MLP files off a non-encrypted DVD-A I had. Deconding MLP to WAV is another story.

LPCM 24bit processor:
http://www.rarewares.org/others.html

EDIT: This tool is of course for use after you have extracted the lpcm files from the dvd.

Funk:
it's the decoding from DVD-A LPCM to .wav that I need, thanks. Grabbing the .AOB files is not a problem, I should have made that more clear. (i've never seen any files with an .mlp extension -- PPCMripper works directly from nonencrypted discs or disc images as they are played, converting PPCM to wav on the fly in real time)

Emanual:
Thanks for the link.

With DVD Video and CD discs I use DVD43 to decrypt.

To rip the wav from DVD Video I use DVD Decrypter
Mode\IFO\Stream Processing.

Can someone tell me if this will work for DVD-A discs?
Just intrested if it works, don't have any DVD-A disc though.

IME DVDDecrypter only sees the VIDEO_TS directory and video-side IFO, VOB etc files. DVD-Audio is stored in an AUDIO_TS directory, as AOB files. So DVDDecrypter isn't right for the job, at least in my hands.

I'm also having a hard time figuring out how to get that LPCM 24bit processor to work. It appears to require vStrip (a VOB ripping utility) to generate a *.raw audio file first, but vStrip, while it does seem able to accept AUDIO_TS\*.AOB files as input, can't parse AUDIO_TS\*.IFO files, throwing a rather big wrench in the process.