| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electronic tuning unit capable of recognizing exact tuning. <P>SOLUTION: The electronic tuning unit detects a pitch of an inputted acoustic signal A by a zero-cross detection part 102 and CPU 104, informing it by an meter or LDE of a display part 105 whether of not the difference between the detected pitch and a predetermined reference pitch is within a predetermined range, and also issuing an alarm by a loudspeaker of a sounding part that the above difference has continuously been within the above predetermined range for a predetermined time. <P>COPYRIGHT: (C)2004,JPO</p> |
