A leg lever adjustment device for a hi-hat musical cymbals device to enable variable adjustment of spacing between an upper cymbal and lower cymbal without the need for hand or foot operation, includes: a) a base support having a connector mechanism for attachment to a hi-hat cymbals device vertical tube; b) a spring-biased cymbal arm rotatably attached to the base support, moveably positioned above the base support; c) a spring so as to bias the cymbal arm upwardly; d) a leg lever connected to the cymbal arm. A user may attach the leg lever adjustment device to a hi-hat such that in the leg lever rest position, the cymbal arm pushes the lower cymbal toward the upper cymbal, and by pressing the leg lever with a leg, pushes the lower cymbal down and away from the upper cymbal to alter impact sound.