Polycom C16 Uživatelský manuál stáhnout pdf (Strana 131)

100

101

Customizing SoundStructure Designs

5 - 51

• High Pass,

• Low Shelf,

• High Shelf, and

• 10 parametric equalizers

as shown in the following figure.

To enable a filter, click the check box next to the filter. This will make the filter

the active filter and allow the parameters to be changed as shown next.

The cut off frequency can be adjusted between 0 Hz and 20,000 Hz, the order

can be adjusted from 2

to 8

, and either a Butterworth or Linkwitz-Riley

filter may be selected.

For each of the 1 parametric filters, the designer can choose from:

• Parametric filter

• Notch filter

• Allpass filter

Parametric filters emphasize or de-emphasize the center frequency with a gain

and bandwidth setting. The user can specify the bandwidth (in octaves), center

frequency (in Hz), and gain (from 0 to 20 dB).

Notch filters eliminate energy (attenuate only) at the center frequency. The

amount of attenuation for the signal is determined by the bandwidth (in

octaves) selected. The bandwidth is defined as where the gain is -3 dB.

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