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DSP

Delay

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The third option within the SETUP menu is DELAY, allowing the output to be
delayed by a preset amount up to 100 milliseconds.
Pressing the selector on this setting and rotating to a specified DELAY value, then
pressing again will apply this delay to the output compared with the input.
This is useful align the sound waves coming from speakers at different distances
from the listener (sometimes speakers are set up as "delay stacks").
The lower setting is for UNIT, which can be toggled between centimetres (cm) and
milliseconds (ms).
(setting the delay in centimetres avoids having to calculate the actual sound delay
differential between 2 points)
Pressing the rotary selector on the BACK option will return to the main menu.
The fourth option within the SETUP
menu is RESET.
Pressing the selector on this option will
allow the user to set all settings back to
the default by highlighting NO or YES
and pressing the selector to confirm.
The last option in the SETUP menu is for
UPDATE, which is used in conjunction
with the USB interface for firmware
updates.
This is described further in the
CORVA software guide.

Pressing the rotary selector on the EXIT option of the SETUP menu will return to the main menu, which has 4
further sub menus for adjusting the output of the CORVA speaker.
Selecting MODE opens the sub menu to
select one of 5 EQ profiles for use in
different applications.
Each profile also shows a graphical
image of the frequency response.
The next sub menu is for LOW CUT,
which has options to remove the lowest
frequencies from the speaker.
There are options for different cutoff
frequencies or FLAT for no low cut.
Cutting the lowest frequencies can help
efficiency for voice applications or when
the speaker is used with a subwoofer.

The next sub menu is for EQ, offering
three bands of tone adjustment.
Rotating the selector to highlight either
TREBLE, MIDDLE or BASS, then pressing
the selector enables the rotary to
boost or cut that band (a graphic at the
bottom shows the frequency response)
Press BACK to return to the main menu.
The last sub menu is for POSITION,
which selects the optimum response for
the CORVA speaker when used in
specific orientations. Select from P.A.,
Floor Monitor, or Wall Mount depending
on the application.
Press BACK to return to the main menu.
The last option on the main menu is EXIT, which returns the display to the home screen.
Programming via USB
For more targeted and in-depth programming, the CORVA active cabinets may be edited on a PC via a USB
connection, as described below. This offers in-depth access to the tone and dynamics profiles of the internal
DSP modes, which can then be saved or recalled as files for customized response.
Before connecting the CORVA active speaker to a laptop, please download the "CORVA_DSP" application from
the AVSL website…. Please ensure the laptop is running Windows 10 or above.
Connect the USB port of the speaker to the laptop via a USB A to B lead and switch the power on to the
CORVA speaker cabinet.
Once connected, run the CORVA_DSP software application on the laptop and the program will open in a
window with a graphic representation of the audio spectrum along with editable settings

Double click on the red Unconnect label at the top right side of the window and a pop up will appear showing
the detected serial port and baud rate. Click "OK" and the label on the top right side will show Connected.
(if this fails, check alternative serial port options in the drop down menu and/or re-start the PC or software)
The top left side has options for File, Mode, Tool, and About.
File: This has options to Import or Export the edited settings as a file on the PC.
Mode: Allows the user to Save to or Load from the individual DSP Modes stored in the CORVA speaker.
There is also a facility to Download all settings from the PC software into the speaker.
Tool: This is for future development and is not yet functional
About: This has some proprietary information about the CORVA speaker.
Beneath these 4 options are 4 tabs that open pages for Input, High, Low, and Option.
The Input page shows the frequency curve with editable points for Location EQ and Mode EQ.
Each EQ in the CORVA speaker is Parametric (PEQ) with settings for Gain, Width (Q) and Frequency (Fc).
To use any of the Location or Mode EQ elements, it is necessary to check the "En" enable box.
Each point may be dragged directly on the graph or edited numerically in the relevant value fields.
An overall Gain slider is provided to balance any overall boost or cut in the EQ settings

The following two tabs relate to the High (tweeter) and Low (woofer) drivers in the Corva speaker.
For each driver, there is a page that shows the frequency curve with directly editable filter points.
Each driver has Hi-Pass and Lo-Pass shelving crossover filter sliders directly beneath the frequency graphic.
Check the Enabled box to activate either crossover, and choose a type from the drop-down list on the left.
As with other filters, these can be edited numerically or by dragging the H and L points on the graph.
For woofers the frequency range will most likely be low and for tweeters, the focus will be on high values.
There are also up to 10 parametric EQs (PEQ) per driver (this is separate from the Location and Mode EQs)
In addition to this, each driver has a Compressor section for dynamics and a Limiter for max level control.
An Output Gain slider on the right side enables overall output control for the relative driver.
A Mute/Unmute switch is also available to enable listening to the either the woofer or tweeter in isolation.
A Delay setting of up to 16 milliseconds can be applied to either driver for time alignment between speakers.
The distance from the focal point of the listener is shown in addition to the time in milliseconds (ms)
A Polarity (Pol+ / Pol-) switch is selectable for phase alignment (note the tweeter may be Pol- by default)
Note: it is advised to use the Mute function before editing the Delay to avoid loud pops through the speaker.
After the High and Low tabs for the driver settings, the last tab is for Option.
This has settings for a Noise Gate, which mutes the input to the amplifier when
there is no signal to reduce background noise during periods of silence.
There are 3 virtual sliders for Threshold, Attack and Release.
To activate the noise gate, you must check the Enabled box.
Threshold is the input level in deciBels (dB) that the gate will be triggered.
Attack is how many milliseconds (ms) for the noise gate to close when triggered.
Release is how many milliseconds for the gate to re-open when the threshold is exceeded by the input signal.
When the CORVA speaker is not being used for long periods, disconnect from the mains supply

Ett av Englands äldsta PA, studio och DJ-fabrikat sedan 1971. Manchester UK. Pionjär inom DJ, även Clabbe Af Geijerstam använde Citronic. Hög kvalitet.