Sumo Summing Amplifier User Manual

Page 17

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Operational Manual

Knobs, Buttons and Flashy Lights

© Audient v1.0 10/2004


Adjusting this will vary the way the
compressor handles transient sounds.

Where control of unruly

transients is required, a

faster attack will clamp

down on peaks. However,

if larger amounts of gain reduction

are applied, unnecessarily fast
attack times may affect high
frequency content.


Peak Limiter

’s response is fast

attack, fast release, and very hard. It has
two functions: Firstly, as a protective
device it can remove the dangerous peaks
that can result in digital clipping.
Secondly, it can be used to increase the
average signal level (as your ear detects
volume by averaging over time) and
increase the perceived loudness of your
mix within the confines of a recording
medium: Great if you want your CDs to
sound as loud as the pros’.

Gain R eduction Metering

– Two

independent meters show gain reduction
at the compression and limiting stages, so
you immediately know where any
adjustments need to be made.

As a rough guide, 3dB of

reduction with a fairly

high ratio should be pretty

inaudible. If you’re looking

for a more general squashing,

values of up to 6dB with a lower
ration (1.5 or 2) should give some
good results. However, be aware

that for the limiter and fast attack
settings of the compressor,
reduction may occur faster than

the meters can show it, so take
this into account and trust your

Be particularly careful of peak
limiting: reduction in excess of
6dB may well cause adverse

effects such as chewing up

your top end.






– Is the final gain

control before the mix leaves the unit, or
enters the digital card. This is useful as a
final adjustment after any gain changes
brought about by dynamics and inserts.

‘Ext In’ Switch

– Switches the

external input into the monitor path. Use
this to monitor playback from your master
recorder, or perhaps to check your mix
against reference material.



– Say no more.

Monitor Mono Switch

– allows you

to check phase coherence, etc. by
summing the monitor outputs in mono.