AES E-Library

Spectral Delay Filters

High- and low-order all-pass networks have been used extensively in a wide variety of audio applications, such as reverberators, because they change the phase and temporal structure without changing the frequency content. Each frequency region experiences an independent delay. In this paper the authors explore how these properties can be used to create unusual special effects. The perceived timbre is changed even though the frequency content remains unchanged. By cascading a large number of such filters, a chirplike sound can be created, which can be equalized and mixed with the original. This is yet another form of sound synthesis.

Authors: Välimäki, Vesa; Abel, Jonathan S.; Smith, Julius O.
Affiliations: Department of Signal Processing and Acoustics, TKK — Helsinki University of Technology, Espoo, Finland; CCRMA, Stanford University, Stanford, CA, USA(See document for exact affiliation information.)
JAES Volume 57 Issue 7/8 pp. 521-531; July 2009 Import into BibTeX

Click to purchase paper or login as an AES member. If your company or school subscribes to the AES Journal then you can look for this paper in the institutional version of the Online Journal. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD JAES57)   /jaes57/7/pg521.pdf

Start a discussion about this paper!