ET Online. This brings new meaning to the phrase "Ghetto Blaster". Monty Norman:

It was Barry's decision to use the electric guitar because the guitar was king at the time and it was essential to use the instrument if the theme was to have a chance of commercial success. He had been a scriptwriter for BBC Radio 3 and was an information editor for that radio station. He talks about each of his fellow cast members, director John Glen, the Broccoli family, how he got the role, various shooting….

International Business World News. They agreed, and there you are: John Barry, who was a pop star in the UK with his instrumental rock-and-roll band, was brought into the project to help with the new theme.