User guide

Composer Pro User Guide
Copyright © 2012 Control4. All Rights Reserved.
Saved: 1/20/2012 1:31:00 PM
200-00005 Composer Pro
User Guide Part 1
Page 36 of 199
Advanced properties:
• Parametric EQ Settings
• Frequency—Center frequency to be adjusted.
• Gain—Set from -24dB (cut) to +6dB (boost) for the center frequency.
• Quality Factor (Q)—Width of the EQ boost/cut settable from 0.5 to 1.0 in 0.1 steps and
1.0 to 10.0 in 1 step (there are no units for Q).
• Shelving EQ Settings
• Frequency—Center frequency to be adjusted.
• Gain—Set from -24dB (cut) to +6dB (boost) for the center frequency.
Notes on EQ settings: The Q setting on the EQ setting determines the bandwidth of the boosted
frequency (or cut frequency).
The Quality Factor is the center frequency divided by the bandwidth (Q=Center
Frequency/Bandwidth), where bandwidth is determined by the frequency points are either side of
the center frequency are -3dB from the center frequency. A setting of 1kHz with a Q of 1 means
that the boosted frequencies affected are from 500Hz to 1.5kHz (1kHz wide to the -3dB points
centered at 1kHz).
Example: If the Q is increased to 10 with the same 1kHz center frequency, then the bandwidth
must decrease by the same ratio. Mathematically:
Q = Freq/BW
10 = 1kHz/BW
BW = 100Hz
Affected frequencies are Center Frequency +/- ½ (BW)