To all listers Sometimes i play a sound in audacity, and mark the selection by the brackets key. I can play that selection, but when i apply effect, Audacity apply to all of the selected track. I think there's something wrong by me, but don't know how to get rid of it. Please help me. Thanks for reading my e-mail. Cuong ________________ Dang Manh Cuong HCMC University of Pedagogy: The Psychology and education 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