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512| Audio and video connections
The Mid Gain control boosts or cuts the frequencies within a selected band
that is defined by a center frequency (Frequency control) and a width con-
trol (Q parameter). For vocals, the gain of a narrow parametric band is typi-
cally reduced to overcome room or voice resonances and smooth the sound
although experienced users may boost a band felt to be missing in a particu-
lar voice as well.
EQ Band Frequency Gain Q
Low 20 Hz … 1.00 kHz ±18 dB –
Mid 50 Hz … 10.00 kHz ±18 dB 0.5 … 10.0
High 500 Hz … 20.00 kHz ±18 dB –
Programming the compressor
This is a compressor optimized for vocals. Be sure to reduce the level of
your amplification when adjusting the compressor, because high settings
can cause more gain and thus feedback.
Compression can be quite subtle until you educate your ears. We typically
sing dynamically, like this (capitals are used to show louder dynamics):
I
LOVE to watch you WALK down the STREET
At acoustic singing levels with no, or very quiet instrumentation, this would
sound fine. When amplified however, the loud words become strident and
even worse, quiet words can be lost in the instrument sounds. The louder the
amplification system and band the more pronounced the loud parts become.
Compression seeks to do the following to your dynamics:
I LOVE to watch you WALK down the STREET
Applied appropriately, the difference between loud and soft is reduced with-
out killing the interesting dynamics in your performance.
▪ Use the On/Off button to turn the compressor on or off.
▪ Use the Threshold control to set the singing level at and above which the
amount of gain reduction (compression) specified by the Ratio control will
occur. The range is 0 dB to -40 dB: 0 dB being the loudest input signal that
can be accepted without distortion and -40 dB being a very quiet signal. If
you sing consistently more quietly than the Threshold, you will not hear any
compression. A good setting for experimentation is -10 dB.
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