I borrowed various countries music from the Toronto Public Library again.
It's really helpful to be able to borrow traditional music CDs that no shop sells in Japan, for free.
The CD I borrowed is Russian, but its printed letters don't seem to be Cyrillic or in the Latin alphabet. The letters seem to be hieroglyphic, i.e ., they represent objects by its shapes.
They looks like Dongba symbols. (Have you ever heard of Dongba symbols, which are used by an ethnic minority who is living in remote area of China? The interesting thing about the letters is not only they are hieroglyphics, but also that they are the only letters whose meaning changes depending on the color.)
However, on second thought, it appears to be a deformed alphabet. It's possible to be that they are made-up letters.
Thank you, Madox, qoppa.
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