Personal computer-music system-song transcription and its application

A description is given of an easy-to-use computer music system using a personal computer, which can transcribe a song into a music score and generate accompaniment to match the melody. The system consists of a 16 bit personal computer, an A/D (analog to digital) converter, a digital signal processor, a microphone, and a music synthesizer. The sounds of a song being sung or hummed are analyzed for pitch and strength. Then, the melody of the song is extracted using the computer´s preprogrammed musical knowledge. After the transcription is completed, a chord progression is determined automatically and three-part accompaniment is generated on the rhythm pattern selected interactively. The melody and generated accompaniment are played together by musical synthesizer.