Here to help and here to learn

[Brent Curtis]

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Hi,
 
I have been doing DVD-A forever and made the first discs at Warner Brothers (Jazz At The Movies and the WMG Sampler).
I now continue DVD-A work at AIX Media Group (65 DVD-As and counting).
 
Why I'll have to check with my boss, Mark Waldrep on the details, but I thing I could help the developers by providing audio samples at all sorts of bit depths and sample rates. We have some real 192kHz stuff and loads of 96/24/6ch stuff that was recorded that way.
 
I also could use some help. We are selling 18 different audio formats at www.itrax.com and I mention this not as a sales pitch, but to point out that there is a need to get 96/24/6ch over to the home theater and we can't find a tool to do it easily. Any help in this area would really be great. Big help might even get you some free AIX discs or iTrax downloads!
 
Summary of current understandings:
1) No media extender can handle 96/24/5.1 audio at this time. Some A/V receivers can take in WMA, but I am not sure if they can handle WMA lossless at 96/24/5.1. No one we have talked to seem interested in making one (Benchmark, Opus, Slim Devices). The bandwidth is there for CAT5 or even Wifi since there are doing video, but no one seems to care about the audio.
 
2) There are no soundcards or A/V soundcards with HDMI output of HD audio to get to a HDMI A/V receiver yet. Nvidia is working on one, but it will be probably. 192/24/7.1 Analog is an option, but it is often unbalanced, noisy, poor DACs, and nothing digital. There are plenty of ways of extending HDMI to long cables lengths. I haven't seen anything with 3 AES outputs to get 5.1, and that would be clunky but acceptable.
 
3) There is no cheap way to get 96/24/5.1 (.wav, FLAC or WMA lossless or others) onto any kind of physical media and play it without pro-sumer or professional applications (Chrome/SurCodeMLP for DVD-A and Ulead MovieFactory 6 for HD-DVD/BluRay (96/24/5.1 LPCM maybe) are the best solutions I know of). MLP is required for DVDA of course due to throughput limitations of the DVD-A spec. Putting it on a DVD-ROM and loading it on a Media server of some kind (or PS3/Xbox) is possible, but expensive hardware is required. There are also a lot of limitations at this time (48k only, SPDIF/toslink only) though this is improving rapidly (PS3 firmware 2.0 finally allows XMB to output 5.1).
 
Thanks in advance,
BAC
 
 

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[Fabrice Nicol]

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Hi Brent,

 

Thank you for your interest in the project.

AIX does a good job, and, yes, a few samples of 192kHz could help.

Currently my priority agenda is:

 

- completion of audio zone-to- video zone navigation with hybrid discs;

- command-line enhancements;

- security;

- gapless issues;

- GUI.

 

Multi-channel is next on the list, so not before a few months, unless other developpers come round in support.

96/24/5.1 is currently out of the question though--as you mentioned yourself, this would require MLP, and MLP is patented, to the best of my knowledge.

The only way to get round this limitation would be to have DVD-Audio players that can read FLAC. I've seen none to date.

 

As Dave explicitly mentioned on the website, the project is sticking to legal territory--which means, multi-channel support, if implemented, will not tackle 5.1.

 

I'll be happy to get feedback from pros, however, notably on how to customize hybrids.

 

Best,

Fab

-----Message d'origine-----
De : dvd-audio-devel-bounces@... [mailto:dvd-audio-devel-bounces@...]De la part de Brent Curtis
Envoyé : vendredi 16 novembre 2007 22:03
À : dvd-audio-devel@...
Objet : [Dvd-audio-devel] Here to help and here to learn

Hi,
 
I have been doing DVD-A forever and made the first discs at Warner Brothers (Jazz At The Movies and the WMG Sampler).
I now continue DVD-A work at AIX Media Group (65 DVD-As and counting).
 
Why I'll have to check with my boss, Mark Waldrep on the details, but I thing I could help the developers by providing audio samples at all sorts of bit depths and sample rates. We have some real 192kHz stuff and loads of 96/24/6ch stuff that was recorded that way.
 
I also could use some help. We are selling 18 different audio formats at www.itrax.com and I mention this not as a sales pitch, but to point out that there is a need to get 96/24/6ch over to the home theater and we can't find a tool to do it easily. Any help in this area would really be great. Big help might even get you some free AIX discs or iTrax downloads!
 
Summary of current understandings:
1) No media extender can handle 96/24/5.1 audio at this time. Some A/V receivers can take in WMA, but I am not sure if they can handle WMA lossless at 96/24/5.1. No one we have talked to seem interested in making one (Benchmark, Opus, Slim Devices). The bandwidth is there for CAT5 or even Wifi since there are doing video, but no one seems to care about the audio.
 
2) There are no soundcards or A/V soundcards with HDMI output of HD audio to get to a HDMI A/V receiver yet. Nvidia is working on one, but it will be probably. 192/24/7.1 Analog is an option, but it is often unbalanced, noisy, poor DACs, and nothing digital. There are plenty of ways of extending HDMI to long cables lengths. I haven't seen anything with 3 AES outputs to get 5.1, and that would be clunky but acceptable.
 
3) There is no cheap way to get 96/24/5.1 (.wav, FLAC or WMA lossless or others) onto any kind of physical media and play it without pro-sumer or professional applications (Chrome/SurCodeMLP for DVD-A and Ulead MovieFactory 6 for HD-DVD/BluRay (96/24/5.1 LPCM maybe) are the best solutions I know of). MLP is required for DVDA of course due to throughput limitations of the DVD-A spec. Putting it on a DVD-ROM and loading it on a Media server of some kind (or PS3/Xbox) is possible, but expensive hardware is required. There are also a lot of limitations at this time (48k only, SPDIF/toslink only) though this is improving rapidly (PS3 firmware 2.0 finally allows XMB to output 5.1).
 
Thanks in advance,
BAC
 
 

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
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