Many fiddlers have not received classical training but have learned by listening to other fiddlers and copying them. The music they play is dance music. Classical violin playing developed out of country fiddle playing. Most fiddlers use bows which are the same as violin bows, but in some countries such as Hungary they use shorter, heavier bows with horse hair that is tied around the frog (the heel of the bow). With this type of bow the player tightens the hair by squeezing it while playing.