In 12-TET, you divide up the octave into twelve equally-sized semitones (the interval between two adjacent piano keys or guitar frets). To go up a semitone from any note, you multiply its frequency by the 12th root of 2 (about 1.05946). To go down a semitone from any note, you divide its frequency by the 12th root of 2. If you go up by an octave (twelve semitones), you’re multiplying your frequency by the 12th root of 2 twelve times, which works out to 2. That’s a perfect octave, hooray! Unfortunately, you can’t exactly create the other harmonics-based intervals by adding up 12-TET semitones; you can only approximate them.
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，更多细节参见搜狗输入法AI Agent模式深度体验：输入框变身万能助手
macinject git:(main) ✗ nm build/test
Four astronauts, including Christina Koch, will take the spacecraft to orbit the Moon in a 10-day mission and hopefully become the closest humans have been to the lunar surface since 1972.
Biology ($45,000)