SAMIJAYANI, O. N., D. . ASTHARINI, and A. . SYAHRIAR. “SOFTWARE DEFINED RADIO FOR AUDIO SIGNAL PROCESSING IN PROJECT BASED LEARNING”. Journal of Mobile Multimedia, vol. 11, no. 3-4, Oct. 2015, pp. 313-20, https://journals.riverpublishers.com/index.php/JMM/article/view/4517.