User Manual
7.2.4: ACS EQUALISER SECTION
DSP ELEMENTS > ACS > EQUALISER
7.2.4: DSP ELEMENTS > ACS > EQUALISER
The channel EQ (Equaliser) section is used
for sculpting the tonal (frequency-based)
balance of the signal. The Performer EQ
has four fully parametric, full range bands
- LF and HF have switchable bell/shelf
modes. You can check the EQ ‘curve’ via
the Touch Screen Main Menu EQ button.
HF Level
Adjust the boost/attenuation of the HF shelving filter.
HF FREQ
Adjust the centre frequency of the HF shelving filter.
The filter will boost or cut the signal at this frequency by the amount set by HF Level. The cut-off frequency will
be lower, according to the filter slope.
HF Q
Adjust the Q of the HF filter and switch bell/shelf mode.
The HF band is normally bell-shaped. When Q is turn to maximum, shelf mode is enabled and the shelving LED
will light. Q is ‘magnification’ at resonance, and is inversely proportional to bandwidth. For an equaliser it is useful
to think of it simply as a bandwidth control (the width of the ‘bell’ in the case of a bell-shaped filter). That is, the
higher the Q, the lower the bandwidth - or the more ‘focussed’ the filter. Bandwidth (in octaves) is shown on the
Touch Screen with the Function Focus feature.
