<p> WSEAS TRANSACTIONS on ACOUSTICS and MUSIC Issue 4, Volume 1, October 2004 ISSN 1109-9577 http://www.wseas.org</p><p>Text Alignment Based on the Correlation of Surface Lexical Sequences 157 Iason Demiros, Christos Malavazos, Ioannis Triantafyllou</p><p>New Encryption Approaches to Mp3 Compression 165 Chih-Hsu Yen, Hung-Yu Wei, and Bing-Fei Wu</p><p>Analogical model for self-sustained sounds generated by organ pipe 173 E. De Lauro, S. De Martino, M. Falanga</p><p>The Song of the Hydra: multiple lead vocals in modern pop music recordings 178 Timothy Warner</p><p>Noise Canceling in Audio Signal with Adaptive Filter 183 John Christakis, Logothesis Antonis, Mpalolakis Antonis, Boulgaris Konstantinos, Chinis Theodore P., Gogornas Ioannis, </p><p>On the Sound Production of the Timpani 188 Lamberto Tronchin, Alessio Buttazzoni and Valerio Tarabusi</p><p>The Song of the Hydra: Multiple Lead Vocals in Modern Pop Music Recordings 194 Timothy Warner</p>