Page 54
DC1048 Integrated Audio Management
Operator’s Manual
Low/High Pass Variable ‘Q’ Filter (Low Pass shown)
The low and high pass variable ‘Q’
filters have adjustable frequency
and ‘Q’ (or Bandwidth) controls.
The ‘Q’ control adjust the
damping of the filter, so that low
‘Q’ settings show less overshoot
at the turnover frequency, but
also slower roll-off.
Remember that ‘Q’ is
1/Bandwidth, so the higher the
‘Q’, the lower the Bandwidth, and
the smaller the range of
frequencies affected. The filter is
primarily 12dB/Octave, but in
achieving this sort of roll-off with a high ‘Q’ value will result in quite a large
overshoot in level at the turnover frequency. This type of filter is often also called
a resonant filter.