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13

DSP Controls

This section describes each of the DSP modules and its controls. As you can see from the diagram
above, some modules are common to both inputs and outputs, while some are specific to one
or the other. Consequently, this section describes all DSP functions, with notes where they are
channel-specific.

GAIN

DLX 260

F1

F3

F2

Out1 Gain

0.0dB

F1

•

F1: Gain, adjustable in 0.2dB steps from –80 dB to +20dB

DELAY

DLX 260

F1

F3

F2

Out1 Delay

1.50ms

F1

•

F1: Delay, adjustable in variable steps from 0 to 400ms

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Summary of Contents for DLX200

Page 1: ...User Manual ...

Page 2: ... 3 COPYRIGHT INFORMATION 4 THANK YOU 5 SAFETY INFORMATION 6 FRONT PANEL 7 REAR PANEL 8 OPERATION 10 DIGITAL SIGNAL PROCESSING 11 DSP CONTROLS 15 UTILITIES 16 TECHNICAL SPECIFICATION 17 QUICK REFERENCE 19 WARRANTY ...

Page 3: ...thout notice LA Audio makes no warranty of any kind with respect to the material in this document and shall not be liable for errors contained herein or for incidental or consequential damages related to the use of the material No part of this document may be reproduced without the prior written consent of LA Audio ...

Page 4: ...e your DLX200 series processor brings you many years of enjoyable DSP system management This manual should get you up to speed with the DLX200 s capabilities controls and specifications It also details safety precautions that must be taken for the safe use of this equipment Please take the time to read this information carefully and store this manual for future reference ...

Page 5: ...icing is required when the apparatus has been damaged in any way such as the power supply cord or plug is damaged liquid has been spilled or objects have fallen into he apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped REGULATORY COMPLIANCE This product complies with both the EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC a...

Page 6: ...r of the LCD Pressing the channel buttons scrolls through the available input and output channels and finally through the utility functions If the current preset is stereo linked the screen will show the channel pairing whose parameters will both be edited EDIT SELECT BUTTONS The currently selected edit page is displayed on the bottom left corner of the LCD Pressing the edit select buttons moves t...

Page 7: ...ht when the limiter threshold is reached MUTES Each output has a mute button and associated status LED Note that the mute buttons do not function when the Secure mode is activated See below for details of Secure mode ...

Page 8: ...balanced source AUDIO OUTPUT CONNECTORS The processed outputs are impedance balanced and wired pin 1 ground pin 2 hot and pin 3 cold An unbalanced input may be driven by connecting pin 3 cold signal to the ground connection of the unbalanced destination input Note that output pin 1 s are ground lifted at audio frequencies but connected to ground at RF for good EMC performance The intention being t...

Page 9: ...dth Gain EQ1 100Hz 1 4Q 0 0dB Pressing the edit navigation buttons gives access to the various pages of parameters available for each channel The currently selected page is shown in the bottom left hand corner of the display The screen shows up to three parameters for a given part of the processing functions on a given channel The edit buttons allow you to scroll in either direction through the di...

Page 10: ...ers while F3 moves along the screen Pressing the Store Button again completes the process and stores the Preset Pressing any other button will cancel the operation DLX 260 F1 F3 F2 Preset Name Store 32 My System F2 F3 F1 STORE STORE Select store location Name preset If you see LOCKED PRESET this means that you re trying to store your settings in location 1 or 2 This is where the base presets are s...

Page 11: ... or save changes to an existing preset first store them as described above before attempting to recall another preset Inappropriate crossover settings for a given system can cause expensive sometimes irreparable damage to attached devices such as amplifiers and loudspeakers Be certain before recalling a preset that any attached devices are muted and that you check settings before passing audio ...

Page 12: ...DSP modules are controlled In Mono format all outputs have unique parameter settings and flexible routing Stereo format pairs the inputs and outputs for stereo operation the parameters of each member of the pair being identical The routing of inputs to outputs is fixed This format is intended for symmetrical stereo operation eliminating the need to make identical parameter adjustments for each cha...

Page 13: ...inputs and outputs while some are specific to one or the other Consequently this section describes all DSP functions with notes where they are channel specific GAIN DLX 260 F1 F3 F2 Out1 Gain 0 0dB F1 F1 Gain adjustable in 0 2dB steps from 80 dB to 20dB DELAY DLX 260 F1 F3 F2 Out1 Delay 1 50ms F1 F1 Delay adjustable in variable steps from 0 to 400ms ...

Page 14: ... Filter shape and slope is selectable from Butterworth Bessel Linkwitz Riley and Hardman Filter slopes of up to 8th order or 48dB octave are provided although not all filter types are available in all slopes The Hardman type filter is particularly interesting Rather than following a linear slope Hardman filters become progressively steeper allowing you to create more precise crossovers with less o...

Page 15: ...cy shown is the turnover point where the filter deviates by 3dB PARAMETRIC EQ DLX 260 F1 F3 F2 Out 1 Freq Width Gain EQ1 100Hz 1 4Q 0 0dB F2 F3 F1 F1 Centre Frequency 10 0Hz to 25 6kHz in variable steps F2 Width display selectable for either Q or bandwidth BW See utilities below to change view options BW adjustable from 0 05 to 5 octaves in variable steps Q adjustable from 14 2 to 0 2 in variable ...

Page 16: ...to considerable in a Proportional Q design An additional source of error can result from confusion between Q and Octave Bandwidth At least one other manufacturer calculates Octave Bandwidth by simply assuming that it is the reciprocal 1 x of Q This would indicate that a Q of 1 would be an Octave Bandwidth of 1 In fact a Q of 1 is really an Octave Bandwidth of 1 39 A clearer indication of the scale...

Page 17: ... effective control of signal dynamics The front panel limit indicators show when the threshold is reached For system protection this module cannot be bypassed but setting the threshold to its maximum level will cause limiting only when it is absolutely necessary ROUTING OUTPUTS ONLY DLX 260 F1 F3 F2 Out1 Source Inp A F1 F1 Output source selectable Input A Input B or Sum A B In mono mode this selec...

Page 18: ...t the display for different viewing angles Parametric EQ bandwidths can be set to display in as Q values or in octaves DLX 260 F1 F3 F2 Util Mode 2 Mono F1 Utility page 2 sets the current format to mono or stereo Care should be taken when swapping between mono and stereo mode as the parameter set for the left hand channels will be copied to and overwrite the right hand settings This is not reversi...

Page 19: ...ndwidth Serial Comms Data 38 4kbaud format 8 data 1 stop no parity PROCESSING Gain 80 to 20dB and Mute 0 2dB steps Output Channel Source Input A Input B and SUM HP Filter Frequency Off 10Hz to 25 4 kHz 1 36 octave steps LP Filter Frequency 10Hz to 25 4kHz and off 1 36 octave steps LP HP Filter Types 12 18 24 dB oct Bessel and Butterworth 12 24 48 dB oct Linkwitz Riley 4th or 8th order Hardman Dela...

Page 20: ...LR Audio Outputs 3 pin Male XLR Serial Comms 9 pin D type Network Comms Neutrik EtherCon Mains 3 pin IEC Mains Power Universal switch mode PSU 85 to 250V AC 50 60 Hz Power Consumption 25W Dimensions 44H 482W 254D mm Weight 2 7kg Net ...

Page 21: ...s LIMIT 6dB Page Channels F1 F2 F3 Notes Gain Ins Outs Gain dB Delay Ins Outs Delay ms In 400ms Out 80ms HPF Ins Outs Freq Hz Filter type and slope dB oct 4th or 8th order Hardman LPF Outputs only Freq Hz Filter type and slope dB oct See above Hi Shelf Ins Outs Freq Hz Slope dB oct Gain dB Lo Shelf Ins Outs Freq Hz Slope dB oct Gain dB Para EQ Ins Outs Freq Hz Width 6 bands per channel Limiter Out...

Page 22: ... Store Use knob F1 to select a preset location Use knobs F2 characters and F3 cursor to create a preset name Press Store to write to the preset location Storing will overwrite any existing settings stored in the selected preset location Base presets in locations 1 and 2 cannot be overwritten TO CHANGE MONO STEREO FORMAT Navigate past the last channel or before the first to Utilities page 2 Use kno...

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