| 摘要 |
PURPOSE:To obtain a device most suitable for an audio signal reproducing system for playing ''KARAOKE'' (orchestration without lyrics) etc., by enabling to set pitch ratio automatically to a preset value for each piece of music of reproduced audio signals. CONSTITUTION:The device consists of a reproducing device 10 that makes variable speed reproduction of audio signal data from a compact disck 11 in which audio signal data are recorded with controlling data in specified sampling frequency, a pitch changing device 20 that makes pitch changing processing of signals obtained from the device 10 and an A/D converter 30 that forms analog reproduced audio signals from output signals of the device 20. Sound pitch of reproduced signals is determined only by pitch ratio by signals given from the pitch ratio controlling section 22 of the device 20 through a pitch change processing section 21 without influenced by reproducing speed by the device 10, and analogized by a converter 30. Thus, reproduced audio signals of preset tempo and tune can be outputted. |
