geoff emerick, documented the change in attitude to pop, as opposed to classical music during the beatles career. in emi at the start of the 1960s, balance engineers were either "classical" or "pop". similarly, paul mccartney recalled a large "pop/classical" switch on the mixing console. emerick also noted a tension between the classical and pop people - even eating separately in the canteen. the tension was also increased as it was the money from pop sales that paid for the classical sessions.