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    • 61. 发明公开
    • Tuning device for musical instruments and computer program for the same
    • AbstimmvorrichtungfürMusikinstrumente und Computerprogrammdafür
    • EP1739653A1
    • 2007-01-03
    • EP06008026.4
    • 2006-04-18
    • YAMAHA CORPORATION
    • Okuyama, Fukutaro
    • G10G7/02G10H1/44
    • G10G7/02
    • A portable tuning device samples discrete values on a fundamental frequency (40a, 40b) of an audio signal, which is equivalent to sound waves produced in a musical instrument, and extracts plural series of fundamental frequency components to be converted to plural bit strings (41a to 41e, 41f to 41j) of 1s and 0s; since a time delay equal to the inverse (Hz') of target frequency is introduced between the first bit of one bit string and the first bit of the next bit string, a series of gradation data has a bit string identical with the bit strings at the consistency with the target frequency, and the series of gradation data has bit strings different from the bit strings at the inconsistency regardless of a cycle time so that user recognizes the tuning state from the bit strings.
    • 便携式调谐装置对音乐信号的基本频率(40a,40b)进行取样,其相当于在乐器中产生的声波,并且提取要转换为多个位串的多个基本频率分量(41a 至41e,41f至41j)为1s和0s; 由于在一比特串的第一比特和下一比特串的第一比特之间引入等于目标频率的反(Hz')的时间延迟,所以一系列灰度数据具有与位串相同的位串 与目标频率的一致性,并且一系列灰度数据具有不同于循环时间的不一致的位串的位串,从而用户从位串识别调谐状态。