Hi listers I've tried the Chris's dynamic Compressor plugin, and I think it easier to the compressor, a plugin exists in current version of audacity. However, I still want to study using the compressor plugin. So I wonder if you could give me some recommend settings, such as Threshold, noise floor etc to get the best sound quality. Thanks in advance. ________________ 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