This bulletin describes three functions in Compass V4.5 for mind440 fittings: 1) The Compression view displays compression ratios and thresholds for the basic channels in the Master program's input/output function. 2) The MPO manager allows adjusting maximum power output levels and deactivating automatic output control. Any adjustments affect all programs. 3) The Recalculate function returns programs to their default settings, with options to recalculate the Master program only or all programs.