while scratching is becoming more and more popular in pop music, particularly with the crossover success of pop-hip hop tracks in the 2010s, sophisticated scratching and other expert turntablism techniques are still predominantly an underground style developed by the dj subculture. the invisibl skratch piklz from san francisco focuses on scratching. in 1994, the group was formed by djs q-bert, disk &amp; shortkut and later mix master mike. in july 2000, san francisco's yerba buena center for the arts held skratchcon2000, the first dj skratch forum that provided “the education and development of skratch music literacy”. in 2001, thud rumble became an independent company that works with dj artists to produce and distribute scratch records.