OUTLINE
YSS235(PTC2) is an audio signal processing LSI for the key control function of one channel. Teh key shift of -1800 cent to +1200 cent can be managed in each 100 cent. When the YSS235 shifts the key of -1200,  -700 and +500 cent, human language can be got clearly.
AS A/D, D/A converter and RAM for the key control are built-in, it is the best for the audio key shift of the analog signal equipments such as the tape-recorder and the VTR.