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Topic: Does AAC use Joint Stereo or is that just for mp3s? (Read 4816 times) previous topic - next topic
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Does AAC use Joint Stereo or is that just for mp3s?

Hello,

I'm a new user to HA. I have an iPod nano that I would like to maximize the battery life on, and I figure AAC will give me the best quality for about 128 kbps.

I'm using the latest Nero AAC encoder with foobar2000. I'm converting the FLACs I have to -q 0.4 AACs. Everything is working well, but when I look at the results in iTunes, I only get stereo files. I have been lurking around here long enough that I know that Joint Stereo is better. Am I doing something wrong, or does Nero AAC-LC only use stereo?

Does AAC use Joint Stereo or is that just for mp3s?

Reply #1 –
AAC (unlike MP3) has the ability to switch between LR/MS on a per band instead of a per frame basis. So AAC is normally always "joint stereo".