Seven pitches are used: 410, 420, 430, 440, 450, 460, and 470 Hz. I retuned a chord zither, but a digital keyboard would also work. Here’s the first page:
Seven pitches are used: 410, 420, 430, 440, 450, 460, and 470 Hz. I retuned a chord zither, but a digital keyboard would also work. Here’s the first page:
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