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Finally, selecting the 'Filter' switch introduces a smooth, 50Hz, 12dB/octave roll-off to effectively
eliminate 'rumble' caused by, among other things, someone's feet moving about near a microphone
stand, nearby traffic noise and AC systems.
The amount of boost (accentuation) or cut (attenuation) that is applied to the audio signal is entirely
dependent on the programme content and it is not our intention to advise on this. Application of
equalisation is a very subjective matter and is best learned by experiment. The equaliser bypass
switch 'EQ' is a useful facility for comparing the signal before and after the application of
equalisation.