AAC+/eAAC/AAC plus/Enhanced AAC

Shared library libaacplus
http://tipok.org.ua/node/17

with patch for ffmpeg, need to download source code from 3GPP.


3GPP Reference encoder
Floating Point: http://www.3gpp.org/ftp/Specs/html-info/26410.htm
Fixed Point: http://www.3gpp.org/ftp/Specs/html-info/26411.htm



aacplusenc
http://teknoraver.net/software/mp4tools/#download
Also with binary for Win/Linux/Mac platform.


NeroAAC
http://www.audiocoding.com/nero_aacenc.html
No source code


DarkGiank's enhAacPlusEnc
http://dgaapenc.berlios.de/en/#ins




To support 80kbps encoding, edit sbr_main.c

{ 64000, 80001, 24000, 2, 12, 9, 3, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 80 kbit/s 48khz*/
{ 64000, 80001, 22050, 2, 12, 9, 3, 0, -3, SBR_SWITCH_LRC, 2 }, /* nominal: 80 kbit/s 44.1khz*/


不知道為什麼不要乾脆都用AAC+ 80kbps來存音樂就好。thepiratebay上面有人分享48kbps的AAC+音樂, 可是種子太少沒有下載來聽。iTunes也支援最高到80kbps。

另外, Ogg Vorbis @48kbps 聽起來其實也不錯。