The Modern Jazz Voice. This is where the Zildjian Sound Lab goes into innovation overdrive. K Customs arm you with a collection of modern K voices like no other. In this range you ll find sounds that set the standard for modern cymbal design. Whether it s the warm shimmering tones of a Ride cymbal, or the complex sizzle of a pair of HiHats, these cymbals all create a uniquely beautiful sound. K Customs enable drummers to vary their K sounds to meet the demands of contemporary music.