AES E-Library

An approach for implementing time-stretching as a live realtime audio effect

This paper presents a novel buffer management technique that allows time-stretching to be implemented as a live realtime audio effect. Previously, implementing time-stretching as an effect in a realtime audio system with live input and output was not practical due to technical and perceptual problems. This system is based on the circular buffer, but with a non-continuous, audio level triggered write methodology. This modification compensates for the fact that the output of a time-stretcher is longer than the input. This allows synchrony between a live input and output to be maintained as well as reducing the processing and memory requirements. The buffer management technique is paired here with the Paulstretch1 time-stretch algorithm, but can be adapted for use with other time-stretch algorithms as well. Also discussed are the implementation design details including live, manipulatable FFT window size and stretch factor parameters.

 

Author (s):
Affiliation: (See document for exact affiliation information.)
AES Convention: Paper Number:
Publication Date:
Session subject:
Permalink: https://aes2.org/publications/elibrary-page/?id=20899


(394KB)


Click to purchase paper as a non-member 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 Join the AES. If you need to check your member status, login to the Member Portal.

Type:
E-Libary location:
16938
Choose your country of residence from this list:










Skip to content