Folksonomy-based tag recommendation for online audio clip sharing
Publication Type:Conference Paper
Source:Int. Soc. for Music Information Retrieval Conf. (ISMIR), Porto, Portugal (2012)
Collaborative tagging has emerged as an efficient way to semantically describe online resources shared by a community of users. However, tag descriptions present some drawbacks such as tag scarcity or concept inconsistencies. In these situations, tag recommendation strategies can help users in adding meaningful tags to the resources being described. Freesound is an online audio clip sharing site that uses collaborative tagging to describe a collection of more than 130,000 sound samples. In this paper we propose four algorithm variants for tag recommendation based on tag co-occurrence in the Freesound folksonomy. On the basis of removing a number of tags that have to be later predicted by the algorithms, we find that using ranks instead of raw tag similarities produces statistically significant improvements. Moreover, we show how specific strategies for selecting the appropriate number of tags to be recommended can significantly improve algorithms' performance. These two aspects provide insight into some of the most basic components of tag recommendation systems, and we plan to exploit them in future real-world deployments.
Poolcasting: an intelligent technique to customise music programmes for their audience
Keywords:CBR; music; recommender systems
Poolcasting is an intelligent technique to customise musical sequences for groups of listeners. Poolcasting acts like a disc jockey, determining and delivering songs that satisfy its audience. Poolcasting additionally ensures that the played sequence does not repeat the same songs or artists closely and that pairs of consecutive songs ‘flow’ well one after the other, in a musical sense.
The thesis describes the poolcasting technique as well as Poolcasting Web radio, an innovative online radio system that broadcasts music programmes customised in real time for their listeners. A set of experiments are reported that evaluate how much the size of the group and its musical homogeneity affect the performance of poolcasting