Integrating background musical knowledge in a CBR system for generating expressive musical performances

Arcos, Josep Lluís; López de Mántaras, Ramon; Serra, Xavier

Integrating background musical knowledge in a CBR system for generating expressive musical performances

Citation

Arcos JL, López de Mántaras R, Serra X. Integrating background musical knowledge in a CBR system for generating expressive musical performances. In: Aha D, Daniels JJ, editors. Case-Based Reasoning Integrations: Papers from the 1998 AAAI Workshop; 1998 Jul 27; Madison, Wisconsin, USA. Palo Alto: AAAI Press; 1998. p. 12-6.

Abstract

This paper briefly describes a system called SaxEx, capable of generating expressive musical performances based on examples. We have done several recordings of a tenor sax expressively playing Jazz ballads. These recordings are analyzed, using spectral modelling techniques, to extract information related to five expressive parametres. The results of this analysis, together with the score, constitute the set of examples (cases) of the case-based component of SaxEx. From these examples, plus background musical knowledge based on Narmour's implication/realization theory of music perception and Lerdahl and Jackendoff's generative theory of tonal music understanding (GTTM), SaxEx is able to infer a set of expressive transformations to apply to any given input sound file containing an expressive musical phrase of another ballad. Finally, SaxEx uses its spectral synthesis capabilities to actually apply the inferred transformations to the input sound file resulting in an expressive sound file at the output.