Birmingham Frequencies, a landmark ambient classic recorded in 1997 by Higher Intelligence Agency and Biosphere, receives its first release on vinyl. The follow up to Polar Sequences, a previous collaborative project between Biosphere & HIA, Birmingham Frequencies features location recordings of the city’s sonic landscape, captured by Bobby Bird and Geir Jenssen, which form the basis of the compositions.Birmingham Frequencies was first presented in concert on 4th October 1997 within the sublime …