??????Del Rosario was himself a pianist and was a member from the novice jazz group Executive Combo Band (composed mostly of politicians and distinguished businessmen). He owned a firm, Trebel Industries, which was the primary maker of pianos and harpsichords from the Philippines. Del Rosario also invented and patented other audio devices right bef… Read More

????????A simple karaoke equipment consists of a audio participant, microphone inputs, a means of altering the pitch on the performed songs, and an audio output. Some very low-end devices make an effort to offer vocal suppression to ensure you can feed normal tunes in the equipment and remove the voice of the initial singer; on the other hand this … Read More