|
|
|
|
|
by epiccoleman
5 hours ago
|
|
Do you have much experience reading musical notation? I've found that engineer types tend to immediately bristle at the weird parts of how notes are named because the system seems really kludgy until you realize that there's actually a utility in the weirdness - namely, that scale patterns look roughly similar in any given key and so sight reading is counterintuitively easier with the current system than it would be in a system which assigned a different position on the staff (or a different name) to each note. Furthermore - we have seven note names because there are seven notes in the major scale, so changing this count would definitely not make sense. To be clear there are definitely warts in the current system, lots of confusing stuff around enharmonics. But there's definitely babies in the bathwater and any alternate system would not want to toss them out. |
|
The first-approximation engineer realization about music (which I suspect the GP is going off of) is "okay, there are 12 notes in the chromatic scale, each octave doubles frequency, therefore the frequency ratio between two adjacent notes is the 12th root of 2 and we should just have 12 names for the notes". This is what's called an "equal-tempered scale"; the gap between each note is the same ratio, and you have a simple geometric progression upwards.
Except we don't actually have an equal-tempered scale. If you try to play on an equal-tempered scale, it'll sound subtly "off", and certain chords will result in "beats" (pulsing) where the frequency ratios are off just enough to cause an unpleasant modulation in loudness.
The modern diatonic scale is based on the circle-of-5ths [1], where the fundamental ratio is the 5th at 3/2 the frequency. It works like this because now chords are an even multiple of frequencies, while you would get an irrational number with the equal-tempered scale. Going up from the root (C), the next 5th up is G at a ratio of 3/2. Then you go up to D (9/4); when you reduce this to lowest terms because you've ascended a full octave, it gives a ratio of 9/8, which is one whole tone above. Next 5th up is A (27/16), which is the ratio in frequencies of a 6th. And then you get E (81 / 32 = 81/64), a major 3rd. And so on. The frequency ratios of the diatonic scale come from repeatedly reducing powers of 3/2 to lowest terms after dividing out the octave.
[1] https://en.wikipedia.org/wiki/Circle_of_fifths