Audio Damage 914 Fixed Filter Bank Upgrade From 907a - Manual (Page 8)

pass filters. Each knob is labeled with the center frequency of its filter. The frequencies are 125, 175, 250,
350, 500, 700, 1000, 1400, 2000, 2800, 4000, and 5600Hz. Each knob controls the loudness of signal
content with frequencies near these center frequencies.
3. The HIGH PASS knob controls the level of the output of the high-pass filter. The high-pass filter’s corner
frequency is 8000Hz, so this knob controls the loudness of all signal content with a frequency of 3800Hz
or above.
The filter-level knobs in our software recreation of the 914 behave in the same manner as the original. If you
rotate a knob fully clockwise, the output of the corresponding filter is passed to the plug-in’s output without
attenuation. As you rotate the knob counter-clockwise, the level of the filter’s output is reduced. If you rotate
the knob fully counter-clockwise, the filter’s output is attenuated by 64dB, which nearly silences the filter. *
The following controls are not present in the original Moog hardware. We added them to our software version
partly in response to comments made by users of our first filter-bank plug-in, the 907A, and to make this
plug-in more versatile:
4. The BANDWIDTH knob varies the shape of the band-pass filters. When the knob is rotated fully counter-
clockwise, the band-pass filters have a broad response shape, gently attenuating frequencies on either
side of the center frequency indicated by the knob’s label. As you rotate this knob clockwise, the filters
become narrower and more sharply reduce frequencies away from the center frequency. The result is that
the filters have more drastic and audible effects as you rotate the knob clockwise. This also reduces the
overall output signal level of the filters, which you can compensate for by turning up the wet level knob.
5. The WET LEVEL knob controls the loudness of the filtered output signal of the plug-in. If the knob is
rotated fully counter-clockwise, the signal is attenuated by 80dB, which makes the filtered signal
inaudible. As you rotate the knob clockwise, the filtered signal becomes louder. Rotating the knob fully
clockwise boosts the filtered signal by +15dB, which compensates for the attenuation of the filters. Note
that this means you can potentially overload your host’s mixer (or whatever the output of the plug-in is
connected to). If you hear crackling or other distortion when you use this plug-in, try turning this knob
counter-clockwise.
* In case you’re wondering, we didn’t just pull -64dB out of the air. -64dB is the rated signal bleed-through amount of the
original hardware.