Universal Audio Ampex ATR-102 Manual page 290

Bell Filter The bell filter is fully parametric, with independent control of frequency, gain,
Q (bandwidth), and gain.
Bell Frequency
This control sets the center frequency of the bell filter. The available range is
150 Hz to 10 kHz.
Bell Q
Bell Q determines the bandwidth of the bell filter. The available range is 0.5
to 3. Smaller Q values cause the bell filter to effect a broader portion of the
frequency spectrum, while high Q values affect a narrower spectrum.
Bell Gain
Bell Gain determines how much boost or cut is applied to the bell filter. The
available range is ±10 dB. To quickly return to the 0 dB setting, click the
GAIN text label.
Note:
Bell Gain is set to 0 dB.
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The two other Bell parameters (Frequency and Q) have no effect when
- 290 - Chapter 33: Precision K-Stereo Ambience Recovery