Etymology of "high" and "low" notes

There may be a psychoacoustic reason for why notes of a high frequency are called high and notes of a low frequency are called low.

First, perception. When high-frequency notes are sounded (from, say, a piccolo or a violin), the notes will resonate in the smaller cavities in your body (such as your head).

When low-frequency notes are sounded (say, from a double bass), the notes will resonate in the larger cavities in your body (such as your chest). So the higher and lower pitches are felt not just in the ears, but in the higher and lower parts of your body. This perception may have given rise to the terms.

Second, production. In the vocal production of music, singers will shift between head voice and chest voice. Head voice is used for, you guessed it, higher notes. (Think the Bee Gees if you have a leisure suit in the back of your closet. Or your favorite coloratura soprano if you saw Lucia di Lammamore or The Magic Flute recently.) Chest voice, produced lower in the body, produces lower notes.

Third, there may also be historical reasons, dating back well before oscilloscopes. Research into musical pitches extends at least back to Pythagoras (sixth century BC).

The word gamut come from Medieval Latin, with the root coming from gamma ut, where gamma referred to the bass G and ut referred to the first note in the lowest of the hexachords. (See Etymology online.) As the lowest note, it also has the lowest number (1).

Today, the middle A is called A4 (440Hz for many orchestras). It’s about the middle of the standard 88-key piano keyboard. The A to the left of it (an octave below) is called A3 and has half the frequency (220 Hz).

Could the numbers assigned to octaves from Pythagoras (sixth century BC) and adopted by Guido d’Arrezzo (sixteenth century) have naturally conferred the sense of low to a note? A gamut or G1 is lower in pitch than a G2, corresponding to its lower notation (a 1 versus a 2).

I don’t have enough breadth to know if high and low pitches work in language systems other than those derived from Proto-Indo-European. I seem to recall from Women Fire and Dangerous things that the word anger is widely associated with heat, in part because of the physiological response when one is angered, namely, that the body temperature actually rises. Lakoff’s book may give you some more insight into other linguistic universals.

Altus and bassus originally referred to relative positions of voices with respect to tenor, which was the fundamental voice in early mediaeval polyphony. At that stage (of polyphony development), there would have been written scores, so the terms would refer to the relative position of voices as written in the score: altus (upper voice); tenor (fundamental voice); bassus (lower voice). In vocal mediaeval music, all of these were male voices. (Furthermore, the voice above alto is superius).

It seems perfectly natural then (at least to me) that musical terms 'high' and 'low' are (a) relative, and (b) opposite to each other. Even terms such as 'high C' in music are relative; it is the desirable top of a soprano range, and consequently relatively very high for what humans can sing, but actually two octaves short of the highest C on a piano keyboard!

I believe (but cannot prove) that at least since the beginning of scoring, people would connect pitch in music with altitude, and the terminology would follow.