SACD and Music videos

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Postby DJ_Izumi » Fri Aug 23, 2002 9:08 am

Mp2 and Mp3 can both contain an analog surround sound signal. Not digital mind you. If you put enough effort, you can keep the surroundsound data in the stereo audio, works better at higher data rates though, and the stereo with surround signal can then be read by what ever dolby gear you have, and it'll be interperated, and mixed into your speakers. I know a 224kbit Mp2 stream can carry an analog surround sound signle quiet effectivly. Mp3 can do it, technicly, never seen it done myself though. Anyway, Mp3 is just a minor adaptation of Mp2 in the first place.

Damn... Now I wonder what a 128kbit mp1 sounds like. *goes to find out*
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Postby DJ_Izumi » Fri Aug 23, 2002 9:16 am

Wow. It sounds like ass. @.@

http://tachibana.dhs.org/mp1test.mp1

You'd be best to use Winamp for this, as few other programs even know what Mpeg Layer I is. The program that did this does great MP2's, and the file was encoded from a Wav that was ripped from a retail CD. No compression untill I added it. I think I understand why the max blue book bitrate is 448kbit now. Woo...

Remember the 80's kids, this is where it all started.
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Postby DJ_Izumi » Fri Aug 23, 2002 9:17 am

Damnit, there's not Edit button. And there CAN be an edit button, Phade just turned it off, he must hate us like that. :|

Check the files info in winamp, genuine Mpeg 1.0 Layer 1. :D
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Postby DJ_Izumi » Fri Aug 23, 2002 9:24 am

Most people only have stero speakers and sorround headphones retail over $250. (Yes, they EXIST in case you didn't know.)

[/quote]

Do you realise he total futility of surround sound headphones? You only have TWO ears. Your mind calculates the 3rd dimension by mesuring the phase and volume difference each ear. Kinda like triangulation. Using only two sound sources, like the speakers of your headphones. That's why there is such a thing as 'Stereo surround' Your mind can get surround sound from just stereo sound, if you have normal headphones.

Just think about it logicly. If you needed more then 2 speakers to get a surround feel, why does your head only have two ears? How would you be able to know where things are by hearing them without more ears?


Once agian, the consumer machine suckers the world. :P
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Postby Dark Kamui » Fri Aug 23, 2002 1:22 pm

I'll let you know when I get one. :roll:
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Postby alternatefutures » Fri Aug 23, 2002 2:31 pm

Coming into this late: While formats like SACD and DVDAudio may both be aural overkill, there is a distinctive audible quality difference between them and regular CDs. The problem is that most dealers have no idea how to set up their SACD/DVDAudio systems, which results in the format sounding only slightly better than a CD.

The great thing about SACDs, though, is that they, themselves, can be backwards compatible. If the manufacture is nice enough, they can put a regular CD-encoded track on the first layer which can be played in a standard CD player. The SACD player will just read its information from the second layer. So it's possible it will not be a pain to rip from them. As far as I know, DVDAudio cannot do this.
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Postby alternatefutures » Fri Aug 23, 2002 2:33 pm

Oh, and Izumi, can you please explain how a digital file can contain an analog signal? That's just baffling me.
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Postby dokidoki » Fri Aug 23, 2002 4:28 pm

Some SACD info: (also mentions the CD-SACD "hybrid" alternatefutures mentioned)

http://www.sony.com/sacd
http://www.bitwareoz.com/sacd/faq.html
http://slate.msn.com/?id=2069628
http://slashdot.org/article.pl?sid=02/0 ... ad&tid=141

They talk about quality improvements, but I'll wait to hear it for myself.
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Postby DJ_Izumi » Fri Aug 23, 2002 7:39 pm

alternatefutures wrote:Oh, and Izumi, can you please explain how a digital file can contain an analog signal? That's just baffling me.


It's contained in the sound wave itself. So, when the sound gets played back, and put threw the Digital to Analog Converter (DAC) and turned into an anlog signal, part of that can be decoded as an analog surround sound signal. Remember, it's only STORED digitally, everything, has to be converted to analog in order to be understandable by humans.
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Postby DJ_Izumi » Fri Aug 23, 2002 7:40 pm

Basicly, it's the same kinda surround signal that can be stored on a Stereo VHS tape.
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Postby alternatefutures » Fri Aug 23, 2002 7:56 pm

Considering there's really no such thing as analog in the physical world, that's not entirely true ^_^

Anyway, the MP3 is not storing an analog signal, it is storing a translation of an analog signal. Careful with your wording ^_^
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Postby DJ_Izumi » Fri Aug 23, 2002 7:59 pm

No... Everything in the world is analog, there's no such thing as digital in the physical world...
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Postby dokidoki » Fri Aug 23, 2002 8:01 pm

DJ_Izumi wrote:No... Everything in the world is analog, there's no such thing as digital in the physical world...

But... but... I'm a 21st century digital boy...
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Postby DJ_Izumi » Fri Aug 23, 2002 8:02 pm

dokidoki wrote:
DJ_Izumi wrote:No... Everything in the world is analog, there's no such thing as digital in the physical world...

But... but... I'm a 21st century digital boy...


With Digital ASCII pr0n even. :o
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