sdevans Wrote: > Any progress you manage to make on this for SB1 users would be most > appreciated. I've written it on my whiteboard and hope to find a few hours to experiment with it soon! I believe the SB1 requires that FLAC is decoded to WAV on the server, so the best way to do this will almost certainly be to write a small utility for bit-twiddling on the fly. (This is preferable to adding an option to spdifconvert, as I'd prefer that the files produced by the utility are known to be correct for SB2.)
It's possible that we'll run into the speed problem with WAV though... but we'll cross that bridge when we come to it! > I did a test last week of some software for extracting surround sound > for playback on the Squeezebox, but somehow my posting dissappeared. > For the record I'll repeat what I found out. > > I used DVD Audio Extractor (shareware / 30-day trial) which provides a > nice interface for selecting audio stream and directly converting or > de-muxing (?) to a variety of formats. > > It pulled the stereo soundtrack of my concert DVD just fine (at 48Khz > as I later found out), and would convert both the Dolby and DTS > soundtracks to multi-channel WAV/OGG/FLAC files too. They all played > back in foobar2000 fine, but I don't know if the extra channels played > proper as I only have a 2 speaker setup on the PC. > > The multi-channel ogg and wav files refused to play at all on the > squeezebox (ripped from either DTS or DOLBY), but the FLAC files did > playback (when converted from 48Khz to 44Khz) but at a really slow > speed (don't know if it was fifth/sixth speed).What bitrate were the WAVs? A > 48kHz 16-bit stereo WAV should be 1536kbit/s; if you've got 4608kbit/s then you have a 6-channel WAV, and your software would need to know how to output multi-channel sound (through your soundcard's 6 analogue outputs). I don't think the Squeezebox can handle such files. It sounds like DVD Audio Extractor is indeed demultiplexing the soundtracks: decoding them to 6 channels of data and writing the separate streams to a file. The spdifconvert utility takes a different approach: it essentially retains the original data from the DD/DTS soundtrack, and makes it possible for an SB2 to pass it on to your amp. All the decoding of the (original) multi-channel format will therefore occur within your receiver. See if you can get DVD Audio Extractor to give you an AC3 or DTS file. You can convert that with spdifconvert, and that just leaves the unique SB1 problem to solve. > Obviously the software's no good for DTS-CDs which is what I'm really > looking for, but I think that just requires a fix to the squeezebox or > tweaking of the conventionally ripped track?Either would do, but I think the > SB1 firmware is fixed now so the track itself would need to be tweaked. You can rip it as usual (with EAC, CDEX, etc) and encode it to FLAC or some other lossless format. If you were to play it on an SB2 (subject to the configuration tips listed in the guide) it would pass the DTS stream through; on an SB1 we come back to the need to invert something. -- smst ------------------------------------------------------------------------ smst's Profile: http://forums.slimdevices.com/member.php?userid=752 View this thread: http://forums.slimdevices.com/showthread.php?t=19260 _______________________________________________ ripping mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/ripping
