Transparency level for AAC

[JellyWorld]

At what bitrate does AAC reach transparency (using the iTunes encoder)? According to this site it reaches transparency at 128kbps but that seems kinda unlikely since according to wikipedia Vorbis reaches transparency at 160kbps and I doubt AAC is more efficient than Vorbis.

 

[Asus]

160kbps ACC should sound pretty good although I won't go beyond that. You don't get much better quality.
To be honest though, it never does become transparent compared to CD audio. You will hear things on the CD that you didn't hear in an MP3 or ACC.

From what I know, Vorbis aims to hold quality but get it compressed as much as possible. ACC is coming from the other direction wanting to keep the size down but with good enough quality. I personally use MP3 with a higher bitrate. I don't care as much about size but want good quality/compatibility.

 

[Sanada]

I've never really known the best MP3 bitrate to rip CDs of with let alone AAC. I use to think 128kbps was enough but realised it wasn't as I can notice the difference between it and CD quality. From then on I've just burned @ 320kbps since I'm not to bothered about the size but don't want to loose any quality.

I've tried Vorbis and think it's great. I compressed a song down to like 40-55kbps VBR and it still sounded pretty dam good. Just wish HL2 could support the format.

What exactly is this "Transparency"? I'm not fermiliar with it.

 

[JellyWorld]

I've never really known the best MP3 bitrate to rip CDs of with let alone AAC. I use to think 128kbps was enough but realised it wasn't as I can notice the difference between it and CD quality. From then on I've just burned @ 320kbps since I'm not to bothered about the size but don't want to loose any quality.

I've tried Vorbis and think it's great. I compressed a song down to like 40-55kbps VBR and it still sounded pretty dam good. Just wish HL2 could support the format.

What exactly is this "Transparency"? I'm not fermiliar with it.

Transparency means the point at which the majority of people can't tell the difference between it and cd quality.

 

[chasinca]

transparent?

AAC is very good at 96KbpS and AAC+ at 48KbpS

www.radiofreecolorado.net is running a taste test just now (for 2 more days).

mp3 - 192KbpS
mp3 - 128KbpS
AAC - 96KbpS
AAC+ - 48KbpS

The idea is this... for about $300 a month you get to stream to ONE of the below audience pools...

mp3 - 192KbpS - 100 listeners
mp3 - 128KbpS - 150 listeners
AAC - 96KbpS - 200 listeners
AAC+ - 48KbpS - 400 listeners

It's content that counts, not channel capacity. Well the money counts too.

Cheers,
Chas