@InProceedings{delfs1997classification,
	author = {Delfs, Christoph and Jondral, Friedrich},
	title = {Classification of piano sounds using time-frequency signal analysis},
	booktitle = {Proc. Int. Conf. Acoustics, Speech, and Signal Process. (ICASSP)},
	pages = {2093–2096},
	year = {1997},
}