EGREM, the state recording label, has sound archives capturing thecomplete history of Cuban history from 1964 onward as well as a lot of what came before the Revolution. Maintaining those archives remains a struggle, thanks to very tight money and the still-not-lifted U.S. embargo. Even a clogged air-conditioner filter presents a major danger: if it can’t be repaired or replaced quickly enough, EGREM’s tapes and records could literally melt.