Hi Listers I usually use change in audacity for saving time, and I have a little question Every time I apply my change, I see an empty folder called "clean" exists parallel my project file. Can any body give me an explaination? Thanks in advance. Cuong ________________ Dang Manh Cuong HCMC University of Pedagogy: The Educational Psychology Mobile: +84 902-572-300 E-mail: dangmanhcuong@xxxxxxxxx Yahoo! ID: manhcuong0312 Skype name: dangmanhcuong facebook: http://facebook.com/dangmanhcuong Blog: http://vi.netlog.com/Cuong_littlecat Website: http://ngoisaodanduong.com http://www.saomaicenter.org Projec-Website: http://dangmanhcuong.googlecode.com