MUSICAL INSTRUMENT WITH FIXED PITCH OF SOUNDS AND UNIFORMLY TEMPERED SOUND LINE Russian patent published in 2003 - IPC
Abstract RU 2217815 C1
FIELD: musical instruments. SUBSTANCE: musical instrument with fixed pitch of sounds and uniformly tempered sound line has sound line comprising 22 steps to increase quality of phonation. EFFECT: increased quality of phonation. 2 cl, 1 dwg
