 It is usually performed by an ensemble of musicians and instruments which collectively are termed a "conjunto jarocho".Son jarocho is often played only on jaranas and sung in a style in which several singers exchange improvised verses called "décimas", often with humorous or offensive content.The instruments most commonly associated with son jarocho are the jarana jarocha, a small guitar-like instrument used to provide a harmonic base, with some double strings arranged in a variety of configurations; the requinto jarocho, another small guitar-like instrument plucked with a long pick traditionally made from cow-horn, usually tuned to a higher pitch and with a four or five thick nylon strings; the diatonic arpa jarocha; the leona, a type of acoustic bass guitar, and sometimes a minor complement of percussion instruments such as the pandero (especially in the style of Tlacotalpan), the quijada (an instrument made of a donkey or horse jawbone) or the güiro.