Ilayaraja worked with a band-for-hire in Chennai, as a guitarist in the 1970s. Thereafter, he worked as a session guitarist, keyboardist and conducted the orchestra for renowned film music directors, including Salil Chowdhury. Later on, Ilayaraja worked as an assistant to Kannada music director G K Venkatesh, with whom he worked on around 200 films. While working with him, Ilayaraja penned his own music compositions as well. He listened to his own compositions by asking the session musicians to play excerpts from his scores. In the meantime, he also hired instruments from R K Shekhar (AR Rahman’s father), who later on joined the orchestra as its keyboardist.