Panchavadyam, literally meaning an orchestra of five instruments, is basically a temple art form has evolved in Kerala. Of the five instruments, four -- timila, maddalam, ilathalam and idakka -- belong to the percussion category, while the fifth one, kombu, is a wind instrument. Much like any chenda melam, panchavadyam too is characterised by a pyramid-like rhythmic structure -- with a constantly increasing tempo coupled with a proportional decrease in the number of beats in cycles. However, in contrast to a chenda melam, panchavadyam uses different instruments (though ilathalam and kompu are common to both), is not related very closely to any temple ritual and, most importantly, permits a lot of personal improvisation while filling up the rhythmic beats on the timila, maddalam and idakka.

 It was primarily the brainchild of late maddalam artistes Venkichan Swami (Thiruvillwamala Venkateswara Iyer) and his disciple Madhava Warrier in association with late timila masters Annamanada Achutha Marar and Chengamanad Sekhara Kurup besides, subsequently, by the late idakka master Pattirath Sankara Marar. They together dug space for a stronger foundation (the Pathikaalam), thus making pachavadyam a five-stage (kaalam) concert with an intelligent mixture of both composed and improvised parts. Spanning about two hours, it has several phrases where each set of the instruments complement the others in a manner that is more like harmony in the Western orchestra than the concept of melody in India. Much like in Panchari and other kinds of chenda melam, panchavadyam too has its artistes lined up in two oval-shaped halves, facing each other. However, unlike any classical chenda melam, panchavadyam seemingly gains pace in the early stages itself, thereby tending to sound more casual and breezy right from its start, beginning after three lengthy, stylised blows on the conch (shankhu).

A panchavadyam is anchored and led by the timila artiste at the centre of his band of instrumentalists, behind whom line up the ilathalam players. Opposite to them stand the maddalam players in a row, and behind them are the kompu players. Idakka players, usually totalling two, stand on both sides of the aisle separating the timila and maddalam line-up. A major panchavadyam will have artistes totalling around 60.