Hall reverb 147
PRO1 Live Audio System
Operator Manual
Item Element Function
1 input meter Two adjacent 11-LED columns — one each for left and
right — comprise the input meters.
2 mix control knob Adjusts the dry/wet signal ratio.
3 modulation
control knob
Specifies the combined rate and depth of modulation
applied the reverb tail.
4 contour time
control knob
Controls the time over which the reflection density
increases during the initial portion of the reverb tail,
between fast and slow.
5 contour
envelope control
knob
Controls the time over which the reflection density
increases during the initial portion of the reverb tail,
between fast and slow.
6 lf x-over control
knob
Specifies the cross-over frequency for the low
frequency decay (lf decay), in the range 20Hz –
500Hz.
7 in switch Switches the Plate Reverb effect in/out.
8 audition button This momentary-action button triggers a short
internally generated sound to aid reverb evaluation
(as a check).
9 output meter Two adjacent 11-LED columns — one each for left and
right — comprise the output meters.
10 hf cut control
knob
High frequency cut control knob applies a 6dB/Oct
low pass filter to the input signal, in the range 200Hz
to 20kHz.
11 lf cut control knob Low frequency cut control knob applies a 6dB/Oct
high pass filter to the input signal, in the range 10Hz
to 500Hz.
12 hf damp control
knob
High frequency damping, progressively reduces the
high frequency content over time, in the range 1kHz
to 20kHz.
13 lf decay control
knob
Specifies the ratio of decay for low frequency content,
in the range 0.5 – 2.0.
14 diffusion control
knob
Increases the density of both the early reflections and
reverb tail, between 0 and 100%.
15 decay control
knob
Adjusts the decay time relative to the room size, from
minimum to maximum.
16 size control knob Specifies the room size (also affects decay), from
small to large.
17 pre delay control
knob
Specifies the time before the reverb begins, between
0ms and 200ms.
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