Editing Musical instrument classification (section)

====Indian====
{{Unreferenced section|date=September 2022}}
An ancient system of [[India]]n origin, dating from the 4th or 3rd century BC, in the [[Natya Shastra]], a theoretical treatise on music and dramaturgy, by [[Bharata Muni]], divides instruments (''[[vadya]]'') into four main classification groups: instruments where the sound is produced by vibrating strings (''tata vadya'', "stretched instruments"); instruments where the sound is produced by vibrating columns of air (''susira vadya'', "hollow instruments"); percussion instruments made of wood or metal (''Ghana vadya'', "solid instruments"); and percussion instruments with skin heads, or [[drum]]s (''avanaddha vadya'', "covered instruments").