Journal Forum

Synthetic Reverberator - January 1960

Sound Board: High-Resolution Audio - October 2015

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Access Journal Forum

AES E-Library

A Method for Envelope Warping in Digital Audio Synthesis

Document Thumbnail

The use of stored envelope functions is common to many audio signal synthesis techniques. This table lookup method is susceptible to audible defects in the synthesized output if care is not taken in the design of the synthesis algorithm, particularly when the rate at which values from the envelope table are accessed is to vary with time. A useful strategy is presented for altering the effective lookup rate for a stored envelope function in order to minimize audible discontinuities between envelope segments with differing lookup rates. The approach creates a smooth warping of the stored envelope function by forcing the envelope lookup index (the envelope phase) to vary according to a cubic polynomial function with matched transitions from envelope segment to segment.

JAES Volume 39 Issue 12 pp. 934-944; December 1991
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. 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:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society