42 song sequences strung together in the manner of an opera, and later by Indra Sabha which had as many as 69 song sequences. However, the practice subsided and subsequent films usually featured between six and ten songs in each production. Right from the advent of Indian cinema in 1931, musicals with song numbers have been a regular feature in Indian cinema. In 1934 Hindi film songs began to be recorded on gramophones and later, played on radio channels, giving rise to a new form of mass entertainment in India which was responsive to popular demand. Within the first few years itself, Hindi cinema had produced a variety of films which easily categorised into genres such as "historicals", "mythologicals", "devotional, "fantasy" etc. but each having songs embedded in them such that it is incorrect to classify them as "musicals". The Hindi song was such an integral features of Hindi mainstream cinema, besides other characteristics, that post-independence alternative cinema, of which the films of Satyajit Ray are an example, discarded the song and dance motif in its effort to stand apart from mainstream cinema The Hindi film song now began to make its presence felt as a predominating characteristic in the culture of the nation and began to assume roles beyond the limited purview of cinema. In multi-cultural India, as per film historian Partha Chatterjee, "the Hindi film song cut through all the language barriers in India, to engage in lively communication with the nation where more than twenty languages are spoken and ... scores of dialects exist". Bollywood music has drawn its inspiration from numerous traditional sources such as Ramleela, nautanki, tamasha and Parsi theatre, as well as from the West, Pakistan, and other Indic musical subcultures. For over five decades, these songs formed the staple of popular music in South Asia and along with Hindi films, was an important cultural export to most countries around Asia and wherever the Indian diaspora had spread. The spread was galvanised by the advent of cheap plastic tape cassettes which were produced in the millions until the industry crashed in 2000. Even today Hindi film songs are available on radio, on television, as live music by performers, and on media, both old and new such as cassette tapes, compact disks and DVDs and are easily available, both legally and illegally, on the internet. Style and format The various use of languages in Bollywood