[Vorbis] aoTuV beta5 is out

[nekomaho]

aoTuV Beta5 (based on aoTuV Release 1)
http://www.geocities.jp/aoyoume/aotuv/

Changes:
aoTuV Beta5 2006/10/24
* The action of noise normalization has been improved.  This has an effect in the sound roughness and tremor problem etc. in the low bitrate.
* The threshold of a stereo mode change was calculated dynamically.  Some of problems which originate in channel coupling by this will improve.
* Noise control of an impulse block was changed (quality 0-10 / 32-48kHz). And pre-echo decreased slightly.
* Tuning of each part was redone according to above-mentioned changed part and additional part.