Doppler Simulation and the Leslie

Julius O. Smith III (send email)
Stefania Serafin (serafin at ccrma.stanford.edu)
Jonathan Abel (abel at batnet.com)
Dave Berners (dpberner at ccrma.stanford.edu)

Music 421 Handout
Center for Computer Research in Music and Acoustics (CCRMA)
Department of Music, Stanford University
Stanford, California 94305

Abstract:

An efficient algorithm for simulating the Doppler effect using interpolating and de-interpolating delay lines is described. The Doppler simulator is used to simulate a rotating horn to achieve the Leslie effect. Measurements of a horn from a real Leslie are used to calibrate angle-dependent digital filters which simulate the changing, angle-dependent, frequency response of the rotating horn.

• DAFx-02 paper (PS) (PDF)
• DAFx-02 presentation (PS) (PDF) (PPT) (HTML)