Dvd-a

[alanuk]

I do alot of audio editing at 32/96000 with Adobe Audition. Obviously to burn to CD-R I have to down sample. If I need to re-edit then its a case of upsampling. Is it possible to burn to DVD-A? If so what software is available and what sampling / bit rates will it handle?

[KpeX]

http://www.dvddemystified.com/dvdfaq.html#1.12

Use the search, there is very little software available for DVD-A authoring, and it is _very_ expensive. AFAIK it will handle up to 96000 hz and 9.6 mbps (for multichannel).

[alanuk]

Thanks for the information - looks like I'll have to look at some alternatives.

[DSP8000]

Look here:
http://www.minnetonkaaudio.com/news/2003/july/discWelderBRONZE.html
looks like they've reduced the prices, or made something afordable.

DSP8000

[Sycho]

that will only do 5.1 at 44.1khz or 48khz and stereo in every other sampling rate, so if you want 5.1 96/24, you'll have to get surcodeMLP

[KpeX]

Originally posted by DSP8000
Look here:
http://www.minnetonkaaudio.com/news/2003/july/discWelderBRONZE.html
looks like they've reduced the prices, or made something afordable.

DSP8000 Interesting, I wasn't aware of that one. Thanks for posting that. that will only do 5.1 at 44.1khz or 48khz and stereo in every other sampling rate, so if you want 5.1 96/24, you'll have to get surcodeMLPTrue, but 5.1 @ 48khz still could be useful at that price, the 'how can I put music on a DVD question' gets asked almost every other day. On the other hand, users won't be too happy about buying a new player for their DVD-A's.

[planet1]

ola,

whats your target sound mode ?


2.0 (plain stereo or dolby surround pro logic I or II)



-CD-A (44.1kHz) (16bit) /(~20bit via HDCD www.hdcd.com / http://www.disctronics.co.uk/technology/cdaudio/cdaud_hdcd.htm),
-DVD-Video (48 or 96kHz) (16/20/24bit),
-DVD-Audio (44.1,48,88.2,96,176.4,192kHz) (16/20/24bit)

obviously the best format would be PCM / LPCM.



5.1



DVD-Video with LPCM,
which supports multiple depths (16,20,24bit) and
two sample rates 48 and 96kHz and
up to 8 channels (obviously at 48kHz only)


DVD-Audio - well the best AUDIO disc format
bit rates (16,20,24bit) @
sample rates (44.1,48,88.2,96kHz)
http://www.disctronics.co.uk/technology/dvdaudio/dvdaud_intro.htm



Compact Disc Audio with 5.1 Sound (though "lossy")
(in compliance with the Red Book specs):


1. the official format - DTS 5.1 Music CD:

http://www.dtsentertainment.com/music-featured.php
http://personal.riverusers.com/~manderso/dts/dtsindex.htm

offers 16/20/? bit 5.1 or 6.1 (DTS-ES) at 44.1kHz


2. the non-official format - AC3 (Dolby Digital) - Audio CD:

offers 16/?/? bit 2.0 (+Dolby Surround embedded) or 5.1 at 44.1kHz
(theoretically all AC3 modes from 1.0 to DD-EX [5.1 + matrixed center surround] should be possible)



---> SO THE CHOICE IS YOURS :cool:

the most cost effective would of course be CD-A
while DVD-Audio would be the most expensive, though also the most sophisticated DISC FORMAT

adios

[Sherlock_2]

sorry
I see u said that DVD-Video can accept 96KHz audio.
But I see that when I want to import a 96KHz wav to surecode or SoftEncode , they say that I only can import 48.0KHz audio files.
So what is wrong ?

[planet1]

First of all, what are you trying to do ???
It seems your trying to encode your 96kHz wav

(where did you got it btw, let me guess you just upsampled a 48 or 44.1kHz one :rolleyes:, and why would anyone need 96kHz btw - just to have some fun - resampling all that 48 / 44.1 stuff :confused: )


to a AC-3 file.
The current DVD-Video specs dont allow AC-3 @ 96kHz.
http://www.dvddemystified.com/dvdfaq.html#3.6.2
http://www.disctronics.co.uk/technology/dvdvideo/dvdvid_audenc.htm


In fact all lossy audio compression formats on DVD-Video use only 48kHz (AC-3, Mpeg1 Layer2, Mpeg2 Multichannel, normal DTS). But DTS marks an exception since it offers its newest 24bit/96kHz format, which to my knowledge isnt backward compatible to ordinary DTS decoders so you would need a DTS 24/96 decoder for such streams.

LPCM as an uncompressed audio stream supports 96kHz for 2Channels. But i doubt you will find many of such DVDs, since LPCM is only mandatory for NTSC DVD-Video discs which havent got any AC-3 streams.

And my previous suggestion was LPCM (96kHz - stereo) NOT AC-3, since alanuk obviously needs an uncompressed audio format - for later editing.

BTW 5.1 Surround Sound uncompressed as LPCM on a DVD-Video shouldnt be very feasible (besides it isnt standardized), since you would need
a special "arranger" chip on board your DVD-Player which outputs those signals via the 5.1 analog RCAs to your receiver/amplifier.
Carrying those signals digitally via optical cable would produce some quite interesting results - either not playing at all - or just in 2.0 mode ----> so i guess only a special receiver would do that job :o.

But back to LPCM and its use for home DVD projects.
I havent seen or heard of a VOB muxer that can actually multiplex any stereo LPCM @ 96kHz with some Mpeg Video stream.

But for ripping operations - you can use your normal DVD-Ripper software by selecting a raw demux of your VOBs.
The resulting LPCM raw files cant be handled by many applications - therefore its better to convert them into a wav container.
Here is a nice tool for that kind of jobs

http://rarewares.hydrogenaudio.org/files/lpcm24.zip

(actually its for 24bit LPCMs, but might also work for 16bit - who would put some 96kHz LPCM on DVD-Video just in 16bit ????):

[ChristianHJW]

DVD Video has the possibility to store a single Stereo audio track with

2x 24 Bit 96 KHz PCM

Every DVD Video player that will be spec conformant to the DVD Video specs, and has the 'DVD Video' sign on its front or package, has to play it. I wonder how many of the cheapo units actually do, so if you plan to return you old DVD Player and your dealer doesnt want to, try to play one of the great Chesky DVD Video's ( Sarak K, Ana Karam, etc. ) with such a 24 Bit 96 KHz audio track and see if it does. If not, just return it because of a 'missing feature' that was promised when you were buying it.

Audio according to DVD Video specs can also be

6x 16 Bit 48 KHz PCM
2x 16 Bit 48 KHz PCM
AC3
MP2


DVD Audio can also be ( in addition to anything DVD Video can be of course )

2x 24 Bit 192 KHz PCM
6x 24 Bit 96 KHz MLP ( Meridian Lossless Packaging )

If your DVD Video authoring tool doesnt accept a 24 Bit 96 KHz audio track, this is a limitation of the authoring software, not of the standard.

BTW : There is absolutely no sense in upsampling an audio track that was downsampled before. You wont gain any quality with doing that, its just a waste of bits. After the downsampling process from 96 KHz to 48 or 44.1 KHz, all the hypothetical high frequency information above 20 KHZ is lost ( if there was any before, that is ), and upsampling after that is of no use at all ..

[kolak]

HI

In my opinion the best dvd-audio software is
Minnetonka Discwelder Chrome 2. There is Sonic DVD-Audio Creator 3 also. The first one is easier but second one have more options. Both of them are professional and expensive.

[ursamtl]

Originally posted by ChristianHJW
BTW : There is absolutely no sense in upsampling an audio track that was downsampled before. You wont gain any quality with doing that, its just a waste of bits. After the downsampling process from 96 KHz to 48 or 44.1 KHz, all the hypothetical high frequency information above 20 KHZ is lost ( if there was any before, that is ), and upsampling after that is of no use at all ..

This certainly makes sense for sampling rates. What about bit depth? I recently asked this question on the hydrogenaudio forum and got very few direct answers. Before processing files for conversion to surround (or any other work) I always remove any DC Offset as it can adversely affect dynamic range. My assumption is that I should first convert the file to a depth of 32 bits. Since all VST and DX plugins process at 32 bits (and in some cases 64 bits), it would make sense. What's your feeling on this? If you agree, then wouldn't it also make sense to convert any 16-bit data to at least 24 bits before processing for audio destined for DVD-Video or DVD-Audio?

Regards,
Steve.