Symetrix 528E User Manual
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QUICK START GUIDE: 528e Voice Processor
Safety
G The lightning flash with arrowhead
symbol within an equilateral triangle is
intended to alert the user of the presence
of uninsulated “dangerous voltage”
within the product’s enclosure that may
be of sufficient magnitude to constitute
a risk of electric shock to persons. The
exclamation point within an equilateral
triangle is intended to alert the user of
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product (i.e.
this Quick Start Guide).
G CAUTION: To prevent electric shock,
do not use the polarized plug supplied
with the device with any extension cord,
receptacle, or other outlet unless the
prongs can be fully inserted.
G Power Source: This Symetrix hardware
uses a switchable power supply that is
preset for 117 VAC or 230 VAC nominal
operation. Ensure that your AC mains
voltage matches the voltage marked on
the rear of the hardware. Use only the
power cord and connector specified for
the product and your operating locale.
A protective ground connection, by way
of the grounding conductor in the power
cord, is essential for safe operation. The
appliance inlet and coupler shall remain
readily operable once the apparatus has
been installed.
G Lithium Battery Caution: Observe the
correct polarity when changing the lithium
battery. There is a danger of explosion if
battery is incorrectly replaced. Replace
only with the same or equivalent type.
Dispose of used batteries according to
local disposal requirements.
G User Serviceable Parts: There are no
user serviceable parts inside this Symetrix
product. In case of failure, customers
inside the U.S. should refer all servicing to
the Symetrix factory. Customers outside
the U.S. should refer all servicing to an
authorized Symetrix distributor. Distributor
contact information is available online at:
http://www.symetrix.co.
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Important Safety
Instructions
! Read these instructions.
@ Keep these instructions.
# Heed all warnings.
$ Follow all instructions.
% Do not use this apparatus near water.
This apparatus shall not be exposed to
dripping or splashing and no objects
filled with liquids, such as vases, shall be
placed on the apparatus.
^ Clean only with dry cloth.
& Do not block any ventilation openings.
Install only in accordance with the
manufacturer’s instructions.
* Do not install near any heat sources such
as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that
produce heat.
( This apparatus shall be connected to
a mains socket outlet with a protective
earthing connection. Do not defeat
the safety purpose of the polarized or
grounding-type plug. A polarized plug has
two blades with one wider than the other.
A grounding type plug has two blades
and a third grounding prong. The wide
blade or the third prong are provided for
your safety. If the provided plug does not
fit into your outlet, consult an electrician
for replacement of the obsolete outlet.
BL Protect the power cord from being
walked on or pinched particularly at
plugs, convenience receptacles, and the
point where they exit from the apparatus.
BM Only use attachments/accessories
specified by the manufacturer.
BN Use only with the cart, stand,
tripod, bracket, or table
specified by the manufacturer,
or sold with the apparatus.
When a cart is used, use
caution when moving the cart/apparatus
combination to avoid injury from tip-over.
BO Unplug this apparatus during lightning
storms or when unused for long periods
of time.
BP Refer all servicing to qualified service
personnel. Servicing is required when
the apparatus has been damaged in any
way, such as power-supply cord or plug
cord is damaged, liquid has been spilled
or objects have fallen into the apparatus,
the apparatus has been exposed to rain
or moisture, does not operate normally, or
has been dropped.
Note: This equipm ent has bee n test ed and foun d to comply with the
limits for a Clas s B digital devic e, pursuant to part 15 of th e FCC
Rules. These limi ts are desig ned to provi de reasonab le prot ection
agains t harmful i nterference in a residen tial instal lation. Thi s
equipm ent generat es, uses an d can radiate rad io frequency energy
and, i f not insta lled and us ed in accordance w ith the ins tructions,
may ca use harmful interferenc e to radio communicati ons. Howeve r,
there i s no guaran tee that in terference w ill not occ ur in a par ticular
instal lation. If this equipm ent do es cause ha rmful inter ference to
radio or televisi on reception , which can be determi ned by tur ning t he
equipm ent off and on, the use r is encour aged to try to correct the
interf erence by on e or more of the follow ing measure s:
• Reor ient or relo cate the rec eiving
ant enna.
• Incre ase the sep aration bet ween the
equ ipment and receiver.
• Conn ect the equ ipment into an ou tlet on
a c ircuit diffe rent fro m that to w hich the
rece iver is con nected.
• Cons ult the dea ler or an e xperie nced
rad io/TV techn ician for h elp.
Modifi cations not expressly a pproved by t he manufact urer could v oid
the us er’s auth ority to op erate the e quipme nt under FC C rules.
Cet ap pariel nume rique de la class e B respecte toutes les Exigences
du Reglement sur le materiel brouilleur du Canada.
What Ships in the Box
• A 528E hardware unit.
• A detachable power cord.
• This Quick Start Guide.
Getting Help
If you have questions beyond the
scope of this Quick Start Guide, please
download the complete User’s Guide
from the Symetrix website or contact
our Customer Support Group in the
following ways:
Te l: +1.425.778.7728
8:00 am to 4:30 pm
Monday through Friday,
Pacific Time
Web: http://www.symetrix.co
Email:
support@symetrix.co
QUICK START GUIDE: 528e Voice Processor
Setup
Settings
Set the controls and switches on the front of the 528E as per the table
below.
Front Panel Control Setting
MIC / LINE As required
-15 PAD Out
MIC GAIN 12 o’clock
DE-ESS FREQUENCY 3K (12 o’clock)
DE-ESS THRESHOLD 0 (Full CW)
DE-ESS IN / OUT Out
DOWNWARD EXPANDER EXP
THRES
COMPRESSOR COMP THRES +20 (Full CW)
COMPRESSOR COMP RATIO 2 (12 o’clock)
EXP/COMP IN / OUT Out
VOICE SYMMETRY IN / OUT Out
LOW EQ FREQUENCY 160 Hz (12 o’clock)
LOW EQ BANDWIDTH 1.5 octaves (12 o’clock)
LOW EQ CUT/BOOST 0 (12 o’clock)
MID EQ FREQUENCY 2.5K (12 o’clock)
MID EQ BANDWIDTH 1.5 octaves (12 o’clock)
MID EQ CUT/BOOST 0 (12 o’clock)
HIGH EQ FREQUENCY 6.8K (12 o’clock)
HIGH EQ BANDWIDTH 1.5 octaves (12 o’clock)
HIGH EQ CUT/BOOST 0 (12 o’clock)
EQ IN / OUT Out
GAIN 0 (12 o’clock)
You can now power on the 528E and it should pass signal. The
POWER LED should be illuminated and the OUTPUT LEVEL LED
display should show some activity.We can now move on to fine tuning
your settings.
BYPASS (Full CCW)
Mic Preamp Gain
Set the MIC GAIN control so that the OUTPUT LEVEL LED display
indicates a signal between -10 and 0 VU. The CLIP LED should almost
never light. If it does, decrease the MIC GAIN control until it does not.
Any loss in gain can be made up for later in the signal chain.
De-Esser Settings
The De-Esser is used to reduce the level of objectionable sibilant
sounds (S and T sounds). Engage the De-Esser by pressing the
DE-ESS IN / OUT button IN. Set the THRESHOLD control so that the
de-esser gain reduction LED display shows about 12 dB of reduction.
Now, “tune” the FREQUENCY control for the maximum sibilance
reduction. Finally, reduce the setting of the THRESHOLD control until
you reduce the sibilance to a tolerable level without harming the quality
of the audio signal.
Downward Expander Settings
Use the Expander to reduce room noise or other low level or
background noise. Set the THRESHOLD control to allow low level
speech sounds to pass while still blocking out room sound or noise.
Compressor Settings
Use the COMP THRES control to determine the level at which the
compressor starts to work. As the sound level increases above the
set threshold, you will see the gain reduction LED display start to
work indicating the amount of gain reduction taking place. Generally
3 to 6 dB is sufficient, unless you are using a low compression ratio
(below 2:1), or you want a special effect. Pick a ratio suited to the task
at hand: low ratios and low thresholds for unobtrusive level control,
medium ratios for overall level control and consistency, high ratios
(greater than 8:1) for limiting or in-your-face sorts of sounds.
Equalizer Settings
Equalization is entirely dependent upon many factors and should
generally be used to correct or enhance the frequency content of the
signal. For example, the default settings should be close for the male
voice. For female voices, the LOW EQ range shifts up to 200 or 300 Hz
and the MID EQ range shifts up to 3-5 kHz.
If you are using a microphone that exhibits proximity effect, then you’ll
probably need to reduce (cut) the bass (LOW EQ) response somewhat.
3-6 dB should be fine, but you’ll have to compromise between a big full
sound and the overbearing low frequency content. A bit of MID EQ will
help make voices cut through and seem louder. The HIGH EQ can add
brightness and intimacy.
It will take some tuning and experimentation based on the signal
source, microphone used and personal taste.
Output Settings
For many applications, setting the output GAIN control to 0 dB works
fine. If you are adding a lot of EQ, this will tend to cause an overall level
increase. Thus, you may need to lower the output GAIN appropriately.
Likewise, if you are using a fair amount of compression, you may
need to add some gain to compensate for the gain reduction in the
compressor section. You should adjust the output GAIN control so that
it provides enough signal level to your connections downstream, yet still
prevents the CLIP LED from illuminating.
The output CLIP LED monitors both the equalizer and the output stage.
Large amounts of EQ boost and/or high signal levels can cause CLIP
indications. If this occurs, lower the signal level via the GAIN control.
It is also possible for the output stage to clip if a processor, inserted
via the OUTPUT STAGE INPUT jack, is contributing gain to the overall
signal path. In this case, either lower the gain of the inserted processor
or reduce the setting of the output GAIN control.
6408 216th Street SW | Mountlake Terrace, WA 98043 USA
T +1.425.778.7728 F +1.425.778.7727 | www.symetrix.co
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