Guido d'Arezzo, an eleventh-century monk in Arezzo, wrote out the six notes of the medieval chant scale on the joints of his left hand so the choir could read them. The names — ut, re, mi, fa, sol, la — come from the first syllables of each line of the hymn Ut queant laxis. The frequencies became canonical. Sit with one for a minute and see what happens.
How to sit with it
Pick one tone and stay there — five to fifteen minutes, eyes closed, volume low enough that you have to lean toward it. Let the sound do the listening for you. Name one thing you're asking the tone to loosen as you begin, then stop holding the thought and just hear.
Pure sine tones, generated locally by your browser. Nothing is streamed and no files are loaded.