 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
In Reply to: Alan Parsons "I Robot" posted by Simon Wagstaff on February 29, 2004 at 05:55:01:
I just got the I Robot HDAD as well as a couple other DAD discs from acousticsounds.com - one thing I wanted to do was make CD copies that I could play in the car. I've been succesful with both DADs and every track except track 1 of 'I Robot', but it's giving me fits.The workflow is like this - I extract the LPCM from the DVD-V side with vStrip (splitting by cell ID so there is one file per track), use LPCM24.EXE to make .wav files, compress with Monkey's Audio to save disc space, then use Foobar2000 to resample to 16/44.1 and write to CD-DA. This has worked for every track except track 1 of 'I Robot', when I run LPCM24 on it it says something about the length not being divisible by 12 and says it is 'truncating', then the resulting .wav file is nothing but noise.
I've tried importing the .raw LPCM files into CoolEdit, but no combination of parameters seems to work. I've been able to get either the left channel or the right channel to be intact, so I tried to remix them together by hand and I got a usable file, but I'm concerned that it's not 100% accurate because Foobar's spectrum analyzer shows a fair quantity of high-frequency content that I think is noise - it's all in the range where I can't hear it on the computer speakers, I'm honestly not sure I would hear it on the hi-fi system either but it still concerns me. There's no similar noise on any of the tracks that LPCM24 succesfully converted.
Has anyone else tried to do this? Could someone else give it a shot and see if you have the same problems? The track plays fine with WinDVD platinum on the PC and in my standalone player, so it's not a problem with the disc, it is something about the PC or the vStrip software that in this one case hoses up the file.
Optionally, could someone verify whether maybe the high frequency stuff I'm seeing in my hacked track is really there or if it's an artifact of my hacking at it? Who knows what weird stuff came out of all those analog synths...?
Follow Ups:
I converted Songs of the Auvergne yesterday with no such problem. If lpcm24 says the lenght of your raw stream is not a multiple of 12 then there is a pronlem with the ripped track. lpcm24 is packed in blocks of 12 bytes. If there is a byte missing at the beginning the reshuffle algorithm gets applied to the wrong bytes and you end up with static.If you send me mail I might make you a version that lets you start from an offset. If your ripping problem is only a the beginning this should let you skip the start and get back to a correct block boundary.
Cheers
Thomas
That's what I figured. I just got done fidgeting and fudging and got the darn thing to work - I ended up using DVD Decrypter to rip the disc to the HDD, then used vStrip to demux the PCM, and the resulting file works fine. Not sure why I had to go all roundabout like that, but as long as it works. What's odd is that this fixed version is actually smaller than the screwed-up version from before. I expected the opposite, like perhaps it had missed bytes at the beginning.Oh well, at least someone out there is providing high-res music in a format that is at least physically possible to get into the PC.
Well, I made the lpcm24 sources available in the hope that the authors of programs like vstrip,smartripper, etc. would eventually support lpcm24 ripping directly from their tools.Sorry for the troubles
Cheers
Thomas
Frank
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
