treble range; high note
Used in traditional Japanese music to refer to the higher register or a high note, as opposed to 乙 (おつ, lower range).
The treble part of this piece is very beautiful.
They perform using both the high and low registers.
high-pitched; shrill
sharp high voice; shrill voice
afterdeck
make a shrill sound; scream shrilly
The kanji 甲 originally means 'shell' or 'first' and is used here as a technical term in Japanese music to denote the higher register. The reading かん is a Sino-Japanese on'yomi.