“…The difference in quality between β < 1 and β > 1 was mentioned briefly by Sylvestre and Kabal (1992) and shown in early results from this testing in (Roberts and Paliwal, 2019). Since the release of the MATLAB TSM Toolbox , the included algorithms, PV, IPL, WSOLA and HPTSM, have been used in most evaluations, while comparisons to commercial algorithms are rare (Damskägg and Välimäki, 2017;Karrer et al, 2006). The source audio used during testing also varies between papers with some papers using the files provided with the MATLAB TSM Toolbox.…”