Hi Any help is appriatiate. I download the libvorbis-1.1.1 and find it support 2 channels only,is it the truth or i just made a mistake? i think the psychology model is modelⅠ,why not use model Ⅱ? is it because the patent question? Thank you! ______________________________________ 注册新浪2G免费邮箱（ http://mail.sina.com.cn/chooseMode.html ） ===================================================================