@conference{grtner2011tempo, title = {Tempo Estimation from Urban Music Using Non-Negative Matrix Factorization}, author = {Gärtner, Daniel}, booktitle = {Audio Engineering Society Conference: 42nd International Conference: Semantic Audio}, month = {Jul}, year = {2011}, url = {https://www.aes.org/e-lib/browse.cfm?elib=15966} }