Drawmer - MX50 Manual http://www.drawmer.com/opmx50.htm
5 of 6 1/31/2005 2:44 PM
reducing string noise on guitars, breath noise on flute, or composite material.
BYPASS
The Bypass position routes the input signal to the output with no processing. These
switches are independent of any linking and will only bypass their respective
channel.
Link
Depressing this switch configures the unit in stereo mode where the average
left/right signal level is used as the floating threshold. The two individual channels
must still be set up as in mono operation. Usually they will be set the same, but in
some circumstances, it may be necessary to have different settings.
In linked mode, the red status LED beneath the Link switch will be illuminated. see
linked operation
CONTENTS
OPERATION
The unit should be connected in line with the signal to be processed via suitable
insert points. Ensure that the insert send and return level on your console matches
the MX50 input/output sockets that are being used.
The MX50 has just two rotary controls and two push button switches per channel,
with a link switch in the centre, for processing stereo material. We recommend that
you try all the control options with some test material, so that the full potential of
the MX50 is explored.
Start with the controls set as follows:-
Frequency -- Clockwise at 8kHz
De-Ess-- Anticlockwise
Air -- Out
Band -- Full
Bypass -- Out
Process some sibilant material and increase the De-ess control. You will notice
that frequencies around 8kHz produce reductions in signal level. This can be
viewed using the G.R display.
Then reduce the frequency and notice that progressively lower frequencies cause
larger amounts of gain reduction. The combination of Frequency and De-ess
should give the required reduction in sibilant levels. Generally, the narrower the
frequency band, the more De-ess will be required to produce the same audible
gain reduction.
There are two possible problems with the above setup, depending on the kind of
source material being processed. On a mixed signal, frequencies above and below
the De-ess band are also attenuated. This may be desirable for a single vocal, but
when processing a mix, it is better to attenuate only the high frequencies, so
switching to Split Band is recommended. Notice that low frequencies are not
affected by the activities of the de-esser, resulting in a more transparent sound.
The extreme high frequencies are still attenuated with the sibilants. Once again,
this may be desirable if the sibilants have high levels of signals above 8kHz. More
usually however, the sibilants are within the normal range and the extreme highs
require less attenuation. In these cases, the AIR switch should be used. This
leaves signals above 8kHz un-processed, thus retaining the original HF detail. The
practical effect of this switch is to preserve all upper harmonics of sibilants whilst
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