AAC LC and HE

HeavyMetal · Post by **HeavyMetal** » Wed Apr 13, 2005 12:24 am

Does anyone know of a program to make Low Complexity AAC files?

I have been using the frontends for BeSweet and the dB Music Converter.
Among other programs I have not found any that give the option for a LC encoding.

I know its a weird request, but I am doing a comparison of various codecs and formats at similar settings. It calls for an LC AAC file, as well as, and HE AAC file. I have the HE AAC file already. (As far as I can tell. I should check better, but I am fairly certain.)

With exception to AAC HE, Vorbis is kicking ass. But AAC is so unstandardized it makes little different if it works a little better. Besides Vorbis still sounds better even at the same quality settings. Weird.

Flint the Dwarf · Post by **Flint the Dwarf** » Wed Apr 13, 2005 2:10 pm

You should probably have put this in Audio Help. I can't really help, though.

Qyot27 · Post by **Qyot27** » Wed Apr 13, 2005 4:33 pm

HeavyMetal wrote:Does anyone know of a program to make Low Complexity AAC files?

I have been using the frontends for BeSweet and the dB Music Converter.
Among other programs I have not found any that give the option for a LC encoding.

I know its a weird request, but I am doing a comparison of various codecs and formats at similar settings. It calls for an LC AAC file, as well as, and HE AAC file. I have the HE AAC file already. (As far as I can tell. I should check better, but I am fairly certain.)

With exception to AAC HE, Vorbis is kicking ass. But AAC is so unstandardized it makes little different if it works a little better. Besides Vorbis still sounds better even at the same quality settings. Weird.

iTunes allows for AAC LC encoding. You can even access it through Quicktime Pro's export function after you install iTunes (using the Export As MPEG-4 option - it saves as an .mp4 file, iTunes uses .m4a as the extension).

You might also want to try out FAAC command-line encoder with the Ivan & Menno frontend. iTunes encodes in CBR, whereas with FAAC you're able to specify ABR (and possibly VBR) encoding. It also allows you to save in the MPEG-4 container as well as output a regular .aac file. I normally use iTunes/Quicktime, but if I'm dealing with higher audio resolutions I'll use FAAC, since Apple's encoders only support up to 48kHz.

HeavyMetal · Post by **HeavyMetal** » Wed Apr 13, 2005 10:59 pm

Sorry about the wrong section thing.

Hey thanks it works pretty well. Pysteldrop works well too.

Stupid me, should have thought to check Rarewares.

Its really a bizarre format. Its still kinda unstandardized.

There isn't even a difference in MP4 and M4A. The later just specifies that there is only audio content.

I found a few programs. Each gets wildly different results with the same settings.

I think Ogg Vorbis is getting my vote.

Qyot27 · Post by **Qyot27** » Thu Apr 14, 2005 9:19 am

To clarify:

HeavyMetal wrote:Hey thanks it works pretty well. Pysteldrop works well too.

Psyteldrop has been outdated for almost three years. The ones developing Psytel's encoder went to work for Nero. It became Nero's AAC encoder.

Its really a bizarre format. Its still kinda unstandardized.

What do you mean by unstandardized?

There isn't even a difference in MP4 and M4A. The later just specifies that there is only audio content.

MP4 is what is usually called the 'legacy extension' when referring to the audio-only files, if I'm not mistaken. M4A was introduced partly because Apple wanted it, and partly because there needed to be a distinction, since an MP4 can also be a pure video file (even though at first that was the only extension you could write AAC audio to and make it work; not many programs supported .aac files).

It's kind of like the difference between the MPEG-1 container and the different MPEG-1 audio formats (I think; haven't really looked into that). If I'm not mistaken, all of the MPEG-1 audio formats were stored in the MPEG-1 container, but those had different extensions also.

HeavyMetal · Post by **HeavyMetal** » Wed Apr 20, 2005 11:25 pm

Yeah I know all that.

Psytel is just easy and quick. I use Vorbis anyway.

MP4 Stuff:

MP4 is getting cannibalized by MP3's popularity.

The video part has been good for a while. The audio can't make up their damn mind. ACC HE is kick ass. LC is more common, but not nearly as good.

Plus a lot of things don't like ACC all together and require the header files of an MP4 extension furthering the size of the file.

M4A is solely an Apple way to say audio only. You can even switch the extensions without a program to do so and they still work. Just turn on view file extension and replace one with the other.

I say its unstandardized because it has so many different ways to do the same job at different levels of quality and effectiveness..

As for MPEG-1 audio its not even made by all the same people. Patents, companies, and universities all over the place on that one. Thats why Fraunhofer said no free MP3 encoders. They don't even own the whole thing. (.....ha Vorbis is better anyway jackasses...)

Im not sure it was even necessary to make a separate extension for MP4 with video. All other MPEGs just use the mpg extension. I find it a little redundant.

At least the video is awesome. I was just doing an audio test. I actually use FLAC for audio.

AnimeMusicVideos.org

AAC LC and HE

AAC LC and HE

Re: AAC LC and HE