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What innonations have been made by Robert del Rosario?​

Sagot :

Answer:

karaoke machine

Its meaning in Japanese is “empty or missing orchestra.” Roberto del Rosario, a Filipino national, was granted patents in 1983 and 1986 for a device generally known as the “karaoke machine.” The most basic karaoke machine today has a microphone, means to alter the pitch of recorded music and an audio output.