User manual

Page 8 User manual P1 Audio Processor
HI PASS FILTER
The switchable high pass filter has a -3dB point at 80Hz and a slope
of 18dB per octave.
PEAK INDICATOR
Lights when the main signal path (before the limiter) comes within
3dB of clipping.
EXPANDER
Variable threshold expander with a fixed expansion ratio of 1:3, fixed
attack time of around 3ms and variable ‘follow-audio’ release time.
COMPRESSOR WITH peakride
A sophisticated multi side-chain compressor with variable threshold,
attack and ratio. ‘Follow-audio’ release time. LED bar graph shows
gain reduction in dB’s.
LIMITER WITH dynamic threshold control AND OUTPUT LEVEL CONTROL
The most sophisticated part of the processing chain but it has no
user controls! Full explanation later in the manual, but for now a brief
set-up procedure;
The limiter is actually the last signal processing element and sits just
before the preset output gain control. The limiter threshold is fixed,
so for quick set-up;
 Ensure the expander and compressor are switched OUT of
circuit
 Apply a fixed level test signal (should be a 50% duty square
wave) to the line input and adjust the input gain control until
the red LIM LED just lights (a suitable test signal is available
to download from our web site, www.safesoundaudio.com)