Year: 2014
Type: article
Abstract: Constant pitch time stretching is not uncommon in audio editing software, however several issues arise when it is used on musical recordings, most notably the doubling and skipping of rhythmic transients. This paper examines three signal processing algorithms which are commonly used to provide constant pitch time stretching: these are SOLA (Synchronous Overlap and Add), TD-PSOLA (Time Domain Pitch Synchronous Overlap and Add), and Phase Vocoder. Enhancements to the SOLA and TD-PSOLA algorithms are provided which may make them more suited to rhythmic music. It is found that each of these three algorithms introduce audible artifacts in the time stretched waveform, the severity of these side effects and what causes them is also discussed.
Author: Brendan Trevorrow
Institution: University of Southern Queensland
Language: English
Topic: Music and Audio Processing
Subfield: Signal Processing
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W25952897