fibers, fitted with several electronic sensors or triggers. The playing feel is close to that of striking an acoustic drum, but with more bounce than an acoustic skin. Roland termed its commercial drum set "V-Drums", which later became the marketed brand name of its electronic drum line. Together, the mathematical/computational modeling, mesh-head pad surface, and improved trigger sensor technology greatly increased the quality of sounds, the "realistic" feel of electronic drums, and the volume levels in practice and live show settings. 2000s-2010s In the 2010s drum kits from major manufacturers have therefore addressed many of the shortcomings of early electronic drum pads and modules. While each of the significant market brands have entry-level units, the professionally marketed kits are geared toward creating sounds and playing experiences that are nearly indistinguishable from playing a quality acoustic kit or world/orchestral percussion instruments. Examples of these high-end professional kits include the Yamaha DTX 950k and Roland V-Drums TD-30KV. Professional kits generally have higher-quality digital sounds These drum modules offer high quality modeled drum sounds – with hundreds of onboard sounds, effects and audio loops and song options/patterns to choose from. Some of these modules allow the user to select tuning, head type, depth/width and material (metal, wood type, etc.). Trigger sensor/reliability and reduction of crosstalk have been vastly improved. Triggering now allows both the head and the rim to produce different sounds, facilitating rim and cross shots as well as shell tapping and many other audio sounds that can be assigned to the head or rim, so that the options for live music increase even more. Cymbals can accommodate more zones: for edge, bow and bell strikes with different sounds, with choking capability and realistic cymbal swells. They have more realistic hi-hats - Acoustic hi-hat cymbals are mounted on in a pair on a stand with a foot pedal enabling the drummer to open and close the hi-hats, which enables drummers to create a wide variety of hi-hat effects, depending on whether the pair of cymbals are fully closed, partially closed, or open. These newer electronic versions are no longer single cymbal pads as in the 3000s, but dual replicated cymbals, that can be mounted on regular stands like their acoustic versions. These cymbals allow for actual opened and closed hand/foot playing. An electronic module detects hi-hat movement/height and position, providing realistic variations of hi-hat sound via degree of placement – open, partially