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Toward Improved Piano-String Modeling for Real-Time Synthesis
Date:Wed, 05/05/2010 - 4:30pm
Location:CCRMA Classroom [Knoll 217]
Event Type:DSP Seminar
Previous digital waveguide models for piano strings have been based on a single transverse plane of vibration. More recent modal-synthesis models (Bank 2010) have added coupled longitudinal waves to provide missing "phantom partials". We know from Antoine Chaigne's recent lecture series and Harold Conklin's classic sound examples (http://www.speech.kth.se/music/5_lectures/sounds/sounds.html) that the longitudinal component of piano-string vibration is important to include in any complete synthesis model. This seminar is devoted to brainstorming efficient digital waveguide models that include both transverse and longitudinal waves excited by the piano hammer.
For the piano-hammer itself, the computational model of Stulov will be reviewed. It calculates a force pulse from the initial hammer velocity (and piano key number). This simple model is is calibrated to measured data over the full range of the piano.
For the piano string, we begin with a general mass-spring-chain model, and discuss various simplifications that may lead to efficient digital waveguide models. Various prior work will be reviewed and candidate designs discussed.
For CCRMA Users Only