為什麼曲譜說明速度

1/3 Tempo

The time signature indicates how many beats there are in a bar and the kind of note (crotchet, minim etc.) being used to represent a best. What the time signature does not show is just how fast the beats are moving. A piece in 2/4 or 4/4 could be a march: but is it a quick march or a funeral march? The speed of the beats is called the tempo: a funeral march, for instance, would be said to be 'in a slow tempo'.
Expressions like 'show tempo' or 'quick tempo' are somewhat vague, but composers can indicate exactly the speed they want. To do this they use a device called a metronome or 'Maelzel's metronome' (named after the man who patented the invention in 1815). It makes s steady, ticking sound-like a clock, except that it can be adjusted to tick at any speed one wishes. (Other types are now available, including electronic versions with a flashing light.) The metronome can be set to tick (or flash) at a given number of beats in a minute, and this number may be shown at the start of the music, thus: crotchet = 60 or M.M. crotchet = 60, (M.M. being an abbreviation for Maelzel's metronome). This means that there are 60 crotchet beats in a minute (i.e. one a second, which can easily be checked against a clock or watch). Similarly, quaver = 48 means 48 quaver beats in a minute, minim = 100 means 100 minim beats in a minute, and so on. Thus, the following two examples would sound exactly the same and last just as long -


圖片參考：http://imgcld.yimg.com/8/n/HA04712379/o/700912100019713873383920.jpg










2009-12-10 23:10:35 補充：
Before the invention of the metronome, composers, could show the speed they wanted only approximately, by writing such words as 'slow', 'moderate' or 'quick'.

2009-12-10 23:11:35 補充：
Even today many prefer to use words rather than to give an exact speed by means of a metronome figure (or 'metronome mark' as it is usually called). In earlier days the words were generally written in Italian - and often still are - although other languages (e.g. German, English or French)

2009-12-10 23:12:13 補充：
are now frequently used instead. The most common foreign words are listed in the Glossary of Foreign Words used for Performance Directions. More will be said about tempo in 10/1.

2009-12-10 23:15:35 補充：
being used to represent a beat. Revised

2009-12-10 23:19:30 補充：
'slow tempo' Revised

2009-12-11 00:46:12 補充：
例如 4 分音符3 拍, 你會有時見到樂譜有4分音符=60, 例如4 分音符=60 ，在1 分鐘內有60 拍4分音符, 這就是拍子速度。

2009-12-11 09:54:35 補充：
Quarter-note =60. 64分音符 in a minute.

2009-12-11 15:29:41 補充：
Sorry! It is not 64.

2012-01-27 23:28:04 補充：
M.M. ♩ = 60

60 crotchet beats per minute.
每分鐘奏60個四分音符。

2012-01-28 14:30:27 補充：
速度 (音樂)

在音樂理論中，速度（tempo）決定了一段音樂的快慢，是音樂的重要元素，亦影響作品的情感與演奏難度。「tempo」是借用了意大利語的「時間」，源於拉丁語的「tempus」。

2012-01-28 14:35:12 補充：
量度音樂速度

音樂速度一般都會以文字或數字標記於一首樂曲的開端，現代習慣以每分鐘多少拍（beats per minute，簡稱BPM）作單位。這表示一個指定的音符，例如四分音符在一分鐘內出現的次數。例如上圖（♩＝120），120是其BPM值，表示每分鐘演奏120個四分音符，即每個四分音符的長度等於1分鐘除以120等分＝0.5秒（如上圖拍子記號是4/4拍，1小節就是0.5秒乘4拍＝2秒長）。BPM的數值越大代表越快的速度。

電子數碼音樂MIDI及其它電腦音樂序列程式的檔案及界面都應用了BPM來表示速度。

2012-01-28 14:37:48 補充：
意大利語速度用詞

基本速度標記下表從快到慢列起，為常見的音樂速度標記：

Prestissimo － 最急板（約為200 - 208 bpm）
Vivacissimo
Allegrissimo
Presto － 急板（168 - 200 bpm）
Vivo
Vivace － 活潑（~140 bpm）
Allegro assai
Allegro － 快板（120 - 168 bpm）
Allegro Moderato － 適度、愉快的急速
Allegretto － 稍快板

2012-01-28 14:38:22 補充：
Moderato － 中板（90 - 115 bpm）
Andantino － 比行板稍快或稍慢，視乎不同時代作曲家有不同意義
Andante － 行板（76 - 108 bpm）
Adagietto － 頗慢
Adagio － 柔板 ／ 慢板（66 - 76 bpm）
Grave － 沈重的、嚴肅的
Larghetto － 甚緩板（60 - 66 bpm）
Lento － 緩板（40 - 60 bpm）
Largo － 最緩板（現代）或廣板
Lentissimo － 比緩板更慢
Larghissimo － 極端地緩慢（40 bpm 或以下）

2012-01-28 14:40:11 補充：
詳細參考資料:

Please click ↓

http://zh.wikipedia.org/wiki/%E9%80%9F%E5%BA%A6_(%E9%9F%B3%E6%A8%82)