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-   -   AAC to replace MPEG audio? (http://www.digitalfaq.com/archives/audio/3554-aac-replace-mpeg.html)

Adder 05-09-2003 09:51 AM

ACC to replace MPG?
 
Hi all

its me again :lol:

I don't know if this has been mentioned, but would it be a good idea to ACC instead of MP2, as i believe ACC produces smaller file sizes and better quality :lol:

I also have a request for you kwag :wink:

You have a weather java thingy on your homepage :) Can you make it so i can access England Citys for weather info, i live in Sheffield in the United Kingdom this would be good :lol:

Later.

PyRoMaNiA 05-09-2003 09:54 AM

ACC might be smaller, but it probably isn't compatible with many standalone DVD players. :wink:

kwag 05-09-2003 12:06 PM

I'm still :jawdrop: :jawdrop: :jawdrop: after hearing my own rip of an audio CD to AAC in my new iBook 8O
I still can't believe the sound :!: In a 128Kbps MP3, I can clearly hear the flaws, specially on high frequency signals. They sound like "wabbled". The same music, encoded with OGG Vorbis, sounds MUCH better, but I still can hear audio flaws. With AAC, there are ZERO audible flaws, even at 128Kbps. Yesterday I spent about 5 minutes comparing my an original audio CD track (Styx - Babe) and my ripped AAC audio at 128Kbps of the same track. There is just absolutely NO difference in quality, compared with my high end Sony earphones. ZERO :!: and the beauty of this, is that most AAC files encoded at 128Kbps are smaller that their MP3 counterpart 8O
I'm about to out go and buy an iPod :D

-kwag

kwag 05-09-2003 12:14 PM

Re: ACC to replace MPG?
 
Quote:

Originally Posted by Adder
I also have a request for you kwag :wink:

You have a weather java thingy on your homepage :) Can you make it so i can access England Citys for weather info, i live in Sheffield in the United Kingdom this would be good :lol:

Hi Adder,

Sheffield is not on the options available at the weather channel. The closest is Leeds. I just added it to the options :wink:

-kwag

ovg64 05-09-2003 12:42 PM

AAC whats that another type of MP3 like audio :?:
Does it need a special codec, player etc. :?:
Give me info. :!: :wink:

kwag 05-09-2003 03:09 PM

Here you go :) :
http://www.vialicensing.com/products.../standard.html
And here: http://www.apple.com/mpeg4/aac/

-kwag

vhelp 05-09-2003 09:17 PM

.
.
@ anyone..
This so called, new codec seems interesting.. but am I correct in assuming
that it cannot be applied to MPEG encoding ??

@ Kwag.. ..what.., no samples to compare up against he he.. just
kidding guy !!

Hope this is not too off topic here.. but.., does anyone know of "another"
PCI card version of a 5.1 surround card (forget about the Audigy/sblive
cards.. those resource hogging and stealling bast@#$#!RD's) out there
for surround sound PC listining ?? ?? ?? oh, and not $$$.$$, but $$.$$
instead hehe .. ??

-vhelp

vhelp 05-09-2003 09:21 PM

.
.
no.., wait.., I mean, a TRUE 5.1 surround sound card, like the
Dolby Prologic I/II sound.. NOT those fake ones from SBLive cards !!

I want NO fakes !! I want actuall reproduction ie, from .AC3 files and
DVD apps etc. I know that WDVD has this feature to demux to a TRUE
prologic card, soo..

Thanks everyone.
-vhelp

muaddib 05-09-2003 10:01 PM

Quote:

Originally Posted by kwag

Great! I have been hearing about AAC for a long time but didn't know it was that good! 8O
I have to try it out... so decoder/encoder -> which / how / where :?: :mrgreen:

Thanks,

urban tec 05-09-2003 11:37 PM

http://cd-rw.org/software/audio_soft...el_aac_enc.cfm

This encoder is mentioned on doom9 as an encoder of choice

There is more on the above here

Also a search on doom9 for aac will give you enough reading to keep you busy for days.

Smoochie3 05-09-2003 11:43 PM

for real transparancy in lossy endoding formats, try Musepack (*.mpc).

muaddib 05-10-2003 02:19 AM

Hey guys,

Thanks a lot! :D

kwag 05-10-2003 08:38 AM

Quote:

Originally Posted by muaddib
I have to try it out... so decoder/encoder -> which / how / where :?: :mrgreen:

Check this out:
http://www.audiocoding.com/
And this:
http://rarewares.hydrogenaudio.org/index.php

-kwag

muaddib 05-11-2003 02:01 AM

Thanks kwag! :D
Now it's time for some AAC testing... 8)

kwag 05-11-2003 09:31 AM

I'm currently ripping some audio CDs with CDex with the PsyTEL AAC encoder plugin :D
I am going to compare the quality to the one produced by Apple's iTunes program, which supports MPEG-4 AAC audio. Apple did screw something up in the encoder, because their format doesn't play in any Windows AAC CODEC :cry: ( Propietary insurance i guess :twisted: )
I have tried several CODECS for WinAmp, and they don't play Apple's AAC format. Same thing if I encode an AAC with PsyTEL encoder on windows, it won't play in iTunes in a MAC :cry:
But If the quality produced by the PsyTEL encoder is the same as the one that iTunes makes, I'll go in that direction because I can see several portable audio CD players in the market that already support AAC audio decoding. I was going to buy an iPod, but now I have my doubts :!:
Because if I can only play Apple's AAC format in an iPod, or in QuickTime Pro for Windows ( which I would have to buy!), then I'm better off using a standard MPEG-4 AAC CODEC that I can play with third party CODECs in both a MAC and Windows and portable CD players :) Plus I'd rather have my AAC music in a regular CD-R (which should fit 10+ hours CD quality in AAC format ), than have all my music in a 10GB iPod that I might drop one day, and bye bye to all my music :cry: :lol:

Edit: This thread should really continue in the audio section :roll: :!: I just moved it

-kwag

jorel 05-11-2003 10:32 AM

cool!

thanks for the news Kwag!
:wink:

i'm downloading and will try it now.
:!:

KingTuk 05-11-2003 11:41 AM

Thought you might find this interesting about AAC...

http://www.cd-rw.org/articles/archive/neroaac.cfm

kwag 05-11-2003 12:31 PM

Excelent article. Makes my hair stand on it's edge when I read things like: AAC+) will be able to deliver 44.1 kHz stereo with good quality even at 32 kbps (that is 4 times smaller than average MP3) 8O 8O
Don't you guys wish this would also apply (with corresponding CODECs, of course 8) ) to video :idea:
That some day, we'll have a full ~2 hour DVD quality movie quality in 256MB memory :!:
I guess with AAC, the audio compression technology is ahead of the current video compression technology :!:
Time will tell, when some crazy guy comes along and designs a video CODEC that will blow all others away. MPEG-4 video is not the solution, and definitively NOT the future of video. There are things better in the works 8)
I wonder if maybe we go crazy one day, and start poking on the AAC CODEC sources, and tweak something and make KAAC encoded audio. But then, they will start to say that it's only a "template" :mrgreen:

-kwag

vhelp 05-11-2003 02:42 PM

>> But then, they will start to say that it's only a "template"
.
.
so let'em.. They'll always be gain-sayers or those that are jelious (jorel's
favorite word hehe)
.
.
always coming up w/ quick :ideasmiley: 's

I'd sure love to hear some samples though. Just curious. I'm not at a point
where I can install a new codec though, but if I have to, I hope it's a simple
"single" file, and not dozens of drones.

-vhelp

jorel 05-11-2003 04:50 PM

8O
AAC+) will be able to deliver 44.1 kHz stereo with good quality even at 32 kbps (that is 4 times smaller than average MP3)
8O
KAAC encoded audio?
8)

please friends, give me tons to read please!

we have to make it!
:wink:

andybno1 05-11-2003 06:35 PM

so would encoding with acc produce mpgs with better 5.1 sound?

kwag 05-11-2003 08:34 PM

Quote:

Originally Posted by andybno1
so would encoding with acc produce mpgs with better 5.1 sound?

The AAC specifications are designed for 48 channels :mrgreen:

Edit:
Quoting:
"AAC is able to include 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 15 low frequency enhancement (LFE, limited to 120 Hz) channels and up to 15 data streams. Besides it has further multi-language capacities."

http://faac.sourceforge.net/wiki/index.php?page=AAC

Latexxx 05-12-2003 12:45 AM

Quote:

Originally Posted by kwag
I am going to compare the quality to the one produced by Apple's iTunes program, which supports MPEG-4 AAC audio. Apple did screw something up in the encoder, because their format doesn't play in any Windows AAC CODEC :cry: ( Propietary insurance i guess :twisted: )
I have tried several CODECS for WinAmp, and they don't play Apple's AAC format. Same thing if I encode an AAC with PsyTEL encoder on windows, it won't play in iTunes in a MAC :cry:

Have you tried converting them to .mp4 files? Some basic info: http://forum.doom9.org/showthread.php?threadid=47748

Some differences between different aac files : http://www.hydrogenaudio.org/index.p...ST&f=14&t=5419


[EDIT]
How to put Psytel aac to ipod:
http://www.hydrogenaudio.org/index.p...T&f=13&t=9055&

jorel 05-12-2003 02:17 AM

hey boys,
what do you are trying to test?

ideas?
:)

kwag 05-12-2003 08:28 AM

@Latexxx,

I tried encoding with the PsyTEL in my PC, and although it plays fine in WinAmp with the AAC CODECs, it doesn't play on the Mac in iTunes. No matter what extension I change it to. But I'll try to follow the procedure described in the link at hydrogenaudio. Maybe that way it will play in iTunes. I'm now considering a Philips EXP 401 MP3 CD Player, instead of an iPod :!:
That player plays MP3 and AAC in small CD-R's :D
So I guess it's more flexible than the iPod, because if many manufacturers start to do that (Panasonic did it to in a small E-Wear player that also plays MP3 and AAC), I can transport my files between different machines. Not the case with the iPod :roll:
http://www.design.philips.com/news_c..._cd_player.asp

-kwag

kwag 05-15-2003 09:46 PM

Hi people,

DON'T buy the Philips EXP 401 MP3 CD Player (Or any of the EXP series players) :!:
I bought it, and returned it 8O
It plays MP3's just fine, but playing AAC, it sucks :!:
The audio voulme level is WAY too low!. It's a desigh flaw on all EXP series :!:
Look at my post here in this thread, and the answer: http://www.hydrogenaudio.org/index.p...&st=25&hl=kwag

-kwag

Latexxx 05-17-2003 02:43 AM

Are there any other problems? Did the turning volume louder help?

kwag 05-17-2003 08:27 AM

Quote:

Originally Posted by Latexxx
Are there any other problems? Did the turning volume louder help?

With the volume turned up to the max, the AAC tracks sound about half the volume as the MP3 tracks, and it's not high enough. On WinAmp, both MP3 and AAC sound the same volume level. So the unit (and the Exp series ) definitely has a design flaw :!:

-kwag


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