C (音名)

中央C（Middle C）為音樂術語，代表位於五線譜大譜表（Grand staff）正中間的音值，或等同於科學音調記號法（Scientific pitch notation）中的「C4」，或等同于小字一组的「c1」，在一些乐器和音乐制作软件上也被称为「C3」。

在钢琴上，每一组的白键都按照C、D、E、F、G、A、B依次排列，因此每一组都有一个C，五线谱上也有多个C，每个C也都有各自的名称，本词条主要介绍中央C。

中央C的位置

此音在鍵盤樂器（如鋼琴）亦偏於中央位置，多是女聲或未變聲男性音域最低可發出的C。例如，88键钢琴上，第四组白键的第一个键，或从左向右数第24个白键，就是中央C。在61键电子琴上，第三组白键的第一个键，或从左向右数第15个白键，就是中央C。在五线谱上，高音谱号下加一线上的音，或低音谱号上加一线上的音，就是中央C。

中央C（C1）分別在高音、中音、次中音、低音譜記號之位置圖

中央C的名称

縱然中央C一般指的都是「C4」，但在不同樂器中，有可能出現不同的稱呼。例如在鍵盤樂器中，「C4」就是中央C。但在西洋笛的演奏家中，中央C指的可能是「C5」。這些差異主要與樂器本身的音調高低有密切的關係。

电钢琴

不同的电钢琴说明书称中央C的方式不同，具体分为C3和C4两种，下面是一些实例。

C3：雅马哈（YAMAHA）电钢琴^[1]

C4：卡西欧（CASIO）电钢琴^[2]，罗兰（Roland）电钢琴^[3]

音乐制作软件

不同软件上的中央C名称也不同，一般分为C3，C4和C5三种，下面是一些实例。

C3：Apple GarageBand^[4]，Logic Pro X，Steinberg Cubase

C4：MuseScore^[5]

C5：LMMS^[6]，FL Studio

中央C的频率

中央C試聽

261.625565300599Hz

播放此文件有问题？请参见媒體幫助。

當以十二平均律計算，並以中央C之上的A作為440 Hz時，中央C的頻率約261.6赫茲。詳見音高（pitch）。另外，如果以纯律计算，中央C的频率是261HZ。

High C与Low C

在声乐中，受人声的客观限制，一般用High C指人声音域中最高的C，比中央C高两个八度（相当于C₆）；Low C指代人声音域中最低的C，比中央C低两个八度（相当于C₂）。

High C相当于：

${\clef treble c'''}$

Low C 相当于：

${\clef bass c,}$

十二律

C在十二律中对应黄钟。

參考資料

^ YAMAHA. P-125, P-121 Owner's Manual (PDF). YAMAHA. [2020-10-29]. （原始内容存档 (PDF)于2020-10-31）.
^ CASIO. PX-S1000 User Guide (PDF). CASIO. [2020-10-29]. （原始内容存档 (PDF)于2020-10-31）.
^ Roland. Roland FP-30 User Guide (PDF). Roland FP-30. [2020-10-29]. （原始内容存档 (PDF)于2020-10-31）.
^ Apple. GarageBand. GarageBand. [2020-10-29]. （原始内容存档于2021-02-02）.
^ MuseScore BVBA. MuseScore Official Website. [2020-12-26]. （原始内容存档于2011-07-28）.
^ LMMS. LMMS. LMMS. [2020-10-29]. （原始内容存档于2021-01-28）.

查论编半音音階上的音
B♯ / C C♯ / D♭ D D♯ / E♭ E / F♭ E♯ / F F♯ / G♭ G G♯ / A♭ A A♯ / B♭ B / C♭

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