Asystems DMP808, User Manual

Page: 25 / 56

23
English
DMP808 / DMP808D
Parametric Equalizers
EQ On/Off Button:
This button can turn the Equalizer
for the currently selected channel on and off.
Reset
: Push the reset button to restore all parameters
back to default.
EQ Band On/Off:
Use these buttons to turn the
corresponding EQ bands on and off. While not named
specifically, these bands can be thought of as the low,
low-mid, high-mid and high frequency bands on your
average 4-band EQ.
EQ Type: For the first and fourth bands on the EQ, users
can select the type of curve used for the EQ. Band 1
can be swapped between a normal EQ band (PEAK),
low shelf filter (SHELF), and high pass filter (CUT). Band
4 can be selected between an EQ band (PEAK), high
shelf filter (SHELF), and low pass filter (CUT). The Low/
High Pass Filters will cut frequencies above and below
the selected frequencies at 18 dB per octave. High and
Low Shelf filters act similarly, but cut frequencies below
the selected frequency by the preset level determined
by the user.
EQ Parameters:
The EQ offers users the ability to view
or edit various parameters/properties of their EQ bands,
including the Gain (dB), the frequency (Hz/kHz) and the
‘Q’ of the EQ band.
Meters:
Both input and output meters are available for
this process, essentially showing the difference in the
overall signal level after equalization.
Feedback Silencer
Feedback occurs when the sound from your speakers
makes its way back into the mixer through microphones.
The audio look causes a high pitch squeal or screech
that can easily ruin your performance. Feedback can be
removed, however, by reducing or removing the problem
I don’t have any output
Have you activated the output channels? Do you see a
signal in the output meters? Have you correctly routed
your inputs to channels, turned levels up, and unmuted
mixes? Have you applied an excessive compressor-
limiter to any input or output signals?
I have a signal, but it’s really distorted!
Are any of the Clip LEDs lighting up for input or output
mixes? Do any of the signals on your entire audio chain
seem excessive? This could include input connectors,
channel inputs, matrix outputs.
My devices are not communicating via Ethernet
Are the red and green LEDs on the Ethernet connectors
lighting up? Are you using a decent quality Ethernet
cable?
My DMP808 won’t communicate with my computer
Are you using a decent quality Ethernet cable? Are your
computer and DMP808 both connected to the same
network? Do you have a firewall turned on?
frequencies. With a razor-thin filter, feedback can be
completely removed without affecting your audio what-
so-ever.
The DMP808 features a 12 filter feedback silencer.
This can operate in 2 different modes: Automatic and
Manual. When set to automatic, the activated filters will
automatically search for and remove feedback. When
set to manual, the user is able to adjust the frequency,
gain and Q of the individual filters.
Parameters:
When the Feedback Silencer is set to
“Manual” it offers users the ability to view or edit various
parameters/properties of their EQ bands, including the
Gain (dB), the frequency (Hz/kHz) and the ‘Q’ of the 12
filters.
Threshold: Adjusting the threshold will determine
the level of signal required for the automatic feedback
silencer to kick in.
31-band GEQ
Graphic equalizers are fantastic in live setups where you
may need to compensate for room acoustics or other
factors. Include a 31-band graphic equalizer on your
speaker output signals to better refine your live audio.
Frequency bands:
The GEQ’s frequency bands can be
boost or cut by the user. Frequencies are set at fixed
frequencies between 20Hz and 20kHz.
TROUBLESHOOTING
How can I use the RS-232 port?
An RS-232 connection is available on the DMP808 to
allow control information to be sent to the unit without the
need of Ethernet connection. Asystems has provided an
implementation reference on the website.
Initializing the DMP808
The DMP808 can be initialized using the DIP switch on
the rear of the device. The left-most pin will allow users
to begin initializing the unit. It can be returned to the
RESUME position to continue operation.
Why are the front panel VRs not working?
The rear panel has a DIP switch that controls these VRs.
If set to the lower position these will be locked and you
will be unable to use them.