128 kbps stereo AAC audio "indistinguishable" from original uncompressed audio?!?!

[simX]

Holy cats!

I was reading up on the new MPEG 4 technology included in the QuickTime 6 Public Preview, and I saw this quote on this page of Apple's website:

AAC compressed audio at 128 kbps (stereo) has been judged by expert listeners to be “indistinguishable” from the original uncompressed audio source.*

The asterisk just says, "See the AAC website for reference."

That floors me. If everything that I read on Apple's site is true, MPEG4 technology will certainly overhaul the digital music sector again, just like MP3 did. Much better quality, smaller file sizes, less CPU power to decode – everything seems great.

I'm just thinking about it: what if soon after QuickTime 6 is released, Apple releases iTunes 2.1 which is compatible with AAC audio and can encode it, and then Apple releases a firmware update to the iPod to allow it to handle AAC audio. That would probably transform my iPod into a music player that can hold, say, maybe 1500 audio files instead of 1000! That would be sooo awesome.

I just hope the rest of the world (*ahem*Windozepeeps*ahem*) realize that MPEG4 technology is beneficial and will adopt it as quickly as Mac users undoubtedly will. I would hate to be toting around my iPod with AAC audio in it while all those suckers are out there encoding in MP3 audio still. While I could still control my music, file sharing services might still offer only MP3-encoded songs, which would be bad.

I can't wait for QuickTime 6 and Jaguar. At most, what, three months?

[rharder]

Using only the Quicktime 6 Preview version of MPEG-4, I've been appalled at the terrible video quality. I hope it's just me.

-Rob

[MacLone]

As far as i know, more compression means less quality.
Maybe they did a great job and MPG4 is more compressed but with the same audio quality. I really don't beleive they can compress it more and have superior sound quality than a less compressed file.

[wdw_]

When I used that QT6 beta that came with Jaguar the Mpeg-4 video quality was terrible, but when I used the free beta from Apple's site the video quality was awsome.

[wdw_]

Wait a sec. If AAC audio encoded at 128 kbps is undistinguishable from it’s original audio source, then why is there even the option to encode it up to 256 kbps in QT6?

[Pascal]

Originally posted by wdw_
Wait a sec. If AAC audio encoded at 128 kbps is undistinguishable from it’s original audio source, then why is there even the option to encode it up to 256 kbps in QT6?

Why ? Simply so that the music will sound better of course !

[wdw_]

But if at 128 kbps the sound is indistinguishable from the original source, then how could it get any better?

[Shifting]

Originally posted by wdw_
Wait a sec. If AAC audio encoded at 128 kbps is undistinguishable from it’s original audio source, then why is there even the option to encode it up to 256 kbps in QT6?

the sound is indistinguishable according to a panel of experts. obviously, not everyone is going to agree with these experts. we should be able to encode at whatever bit-rate we want...experts be damned. if 128kbps really is cd-quality, then i'm sure few will encode any higher then that, but it's good to have the option to encode at higher bit-rates if we want to, right? more options are good, less options are bad.

:edit: used the wrong quote. oops.