- From: Alan Gresley <alan@css-class.com>
- Date: Sat, 16 Jul 2011 17:17:20 +1000
- To: Daniel Weck <daniel.weck@gmail.com>
- CC: www style <www-style@w3.org>, fantasai <fantasai.lists@inkedblade.net>
On 15/07/2011 4:23 AM, Daniel Weck wrote: > Here's my proposal: > > ---- A semitone interval corresponds to the step between each note on > a equal temperament chromatic scale. A semitone can therefore be > quantified as the difference between two consecutive pitch > frequencies on such scale. The ratio between two consecutive > frequencies separated by exactly one semitone is the twelfth root of > two (approximately 1.05946). As a result, the value in Hertz > corresponding to a semitone offset is relative to the initial > frequency the offset is applied to (in other words, a semitone > doesn't correspond to a fixed numerical value in Hertz). ---- I am very happy with this wording. It now makes sense. Just one note. A better appropriation of the ratio between two consecutive frequencies (semitones) is 11011/10393 which is 1.0594631 (limited to seven decimal places). -- Alan Gresley http://css-3d.org/ http://css-class.com/
Received on Saturday, 16 July 2011 07:17:46 UTC