Dimitrios K. Fragoulis Constantin Papaodysseus Mihalis Exarhos G. Roussopoulos Thanasis Panagopoulos D. Kamarotos Automated classification of piano-guitar notes. 1040-1050 2006 14 IEEE Transactions on Audio, Speech & Language Processing 3 http://doi.ieeecomputersociety.org/10.1109/TSA.2005.857571 db/journals/taslp/taslp14.html#FragoulisPERPK06