Azizan, M.H., Amirul Syafiq Sadun and Nor Anija Jalaludin (2022) “Singing Pitch Guide for Multiple Voice Pitch Offset Detector”, Progress in Engineering Application and Technology, 3(1), pp. 479–484. Available at: https://periodical.uthm.edu.my/index.php/peat/article/view/6247 (Accessed: 15 August 2026).