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OFAI-TR-2010-07 ( 252kB PDF file)

Hubs and Orphans - an Explorative Approach

Martin Gasser, Arthur Flexer, Dominik Schnitzer

In audio based music similarity, a well known effect is the existence of hubs, i.e. songs which appear similar to many other songs without showing any meaningful perceptual similarity. We show that this effect depends on the homogeneity of the samples under consideration. We compare three small sound collections (consisting of polyphonic music, environmental sounds, and samples of individual musical instruments) with regard to their hubness. We find that the collection consisting of cleanly recorded musical instruments produces the smallest hubs, wheras hubness increases with inhomogeneity of the audio signals. We also investigate how well the three data sets can be mapped into a 2D visualization space by a dimensionality reduction algorithm based on Multidimensional Scaling.

Keywords: Audio Similarity, Music Recommendation, Hubs

Citation: Gasser M., Flexer A., Schnitzer D.: Hubs and Orphans - an Explorative Approach. Technical Report, Österreichisches Forschungsinstitut für Artificial Intelligence, Wien, TR-2010-07, 2010