@conference {IIIA-2007-1444, title = {Playing with cases: Tempo Transformations of Jazz Performances using Case-Based Reasoning}, booktitle = {20th FLAIRS Conference, Key West, Florida}, year = {2007}, pages = {8-11}, publisher = {AAAI Press}, organization = {AAAI Press}, abstract = {The research described here focuses on global tempo transformations of monophonic recordings of saxophone jazz performances. We have investigated the problem of how a performance played at a particular tempo can be automatically rendered at another tempo while preserving its expressivity. That is, listeners should not be able to notice, from the expressivity of a performance, that has been scaled up or down from another tempo. To do so, we have developed a case-based reasoning system called TempoExpress. The results we have obtained have been extensively compared against a standard technique called Uniform Time Stretching (UTS), and we show that our approach is superior to UTS.}, author = {Ramon L{\'o}pez de M{\'a}ntaras and Maarten Grachten and Josep Lluis Arcos} }