Solfeggio · UT
396Hz
Solfeggio narrative: Letting Go
The lowest number in the set. Chosen as concert pitch, it means a clear step down — no longer fine-tuning, but transposing.
Chladni figure · n 4.79 · m 7.66
What happens when you switch
This is no longer a fine adjustment.
Almost two semitones lower than the standard. Everyone hears this, even without a side-by-side comparison: voices get darker, bass gets heavier, the whole track sits lower in the room. Choosing this means deliberately choosing a different sound space — no longer a fine adjustment.
Origin
Where the name comes from
The syllables Ut, Re, Mi, Fa, Sol, La go back to Guido of Arezzo in the 11th century. He took the opening syllables of the lines of a Latin hymn and turned them into the first workable method for naming melodies, rather than just singing them back by ear. This “Ut–Re–Mi” became today’s “Do–Re–Mi”.
What Guido did not do: assign hertz values to these syllables. The term hertz did not exist at the time, and neither did a binding tuning standard. The assignment of specific frequencies to these syllables is considerably more recent and does not date back to the Middle Ages — it is often told that way, but the sources for it are modern.
All ten, as the ear hears them
Plotted in Cents measure small pitch differences: 100 cents make a semitone, 1 cent is barely audible. More about cents → relative to 440 Hz — the unit the ear actually reckons in. A semitone is 100 Cents measure small pitch differences: 100 cents make a semitone, 1 cent is barely audible. More about cents → , an octave 1200.