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KME DAP 26 User Manual

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User Manual
DAP 26
Digital Audio Processor
KME-Control
Remote Software Mainframe

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Summary of Contents for KME DAP 26

  • Page 1 User Manual DAP 26 Digital Audio Processor KME-Control Remote Software Mainframe...
  • Page 2 DAP 26 HW Version 1.2 r0026 DAP 26 MC Version 1.1 r0052 KME-Control Version 1.00 Build 0073 DAP 26 Plug Version 1.00 Build 0149 Manual Rev. Version 1.00 EN Stand: 12.04.2005 service@kme-sound.com...

  • Page 3: Functional Units

    Functional units The DAP 26 offers a lot of functional units for general audio processing using a powerful DSP mainframe such as 9 filter banks with each 5 configurable filters of 9 different types, 6 crossover units with two combinable filters out of 3 types, 3 master delays (up to 2000 ms / 685 meters), 6 channel delays (up to 500 ms / 170 meters) and 6 dynamic processors (compressor / limiter / noise gate).
  • Page 4 Display K.M.E. DAP26 V0.1 Preset Configuration Choose an option! A 4x20 back-lighted LCD display shows the navigation menu. You can set all software parameters on the unit itself. Arrows in the lower right corner show the directions to navigate to submenus. (see appendix ‘navigation structure’). Use the navigation pad to move between the menus.
  • Page 5 There is a 10-digit LED bar-graph for each output channel which displays the following information: a) there is an output signal on channel X (if the mute switch is not activated) b) the signal on output X exceeds the maximum output level (if the mute switch is not activated) c) there is an output signal on channel X, the dynamic processor (Compressor/ Limiter) is activated and works...

  • Page 6: Rear Side

    “b” corresponding to the signal level your source units work with. XLR-to- XLR balanced audio connection Jack-to-XLR balanced audio connection Use one of this cables for connecting the analog audio inputs of the DAP 26 to your mixer / stagebox or to another signal source.
  • Page 7 O U T P U T The analog audio outputs 1-6 are electronically balanced, male XLR sockets. We do not recommend connecting unbalanced destination devices to the DAP 26. The nominal output level is reached if the yellow LED in the level meter lights up.
  • Page 8 OUTPUT INPUT Connect the DAP 26 to a free COM port of your PC using the supplied RS232 cable. You must only use the upper connector labelled ‘RS232/CAN’. Make sure that the yellow LED beside the connector GLOWS BEFORE connecting the unit to your PC! If the LED does NOT glow, operate the switch which is located just below this LED using a suitable tool.
  • Page 9 7 8 9 CAN Bus Link cable This cable can be used connecting the DAP 26 to the CAN port interface box. Use such cable also for linking the CAN bus from unit to unit. Do not forget connecting the CAN terminator plug to the free connection port of the last unit, otherwise the CAN transmission could be disturbed.
  • Page 10 This cable can be used connecting the DAP 26 to the CAN port interface box, using your multicore system (i.e. XLR). Use such cable also for linking the CAN bus from unit to unit. Do not forget connecting the CAN terminator plug to the free connection port of the last unit, otherwise the CAN transmission could be disturbed.
  • Page 11 The DAP 26 works with all types of mains power between 100 and 250 volts without pre-selection.
  • Page 12 Handling Functional units (digital) All of this functional units are to be set directly in the hardware unit or using the K.M.E. Control software. The names refer to the MENU PROMPT. Input Channels DSP- functions in the input channels Delay Channel [1 …...
  • Page 13 Mute of the output Gain Channel [1 … 6] Value [-60 dB ... +10 dB] Gain level of the output Phase Channel [1 … 6] Phase [0° (In Phase) … 180° (Out of Phase)] Polarity of the output Filter Channel [1 … 6] Filter [1 ...
  • Page 14 Depending to the setting of the parameters a dynamic processing of the input material will occur when the audio signal level exceeds the adjusted threshold value. The gain reduction works corresponding to the selected algorithm (compressor or limiter). The limiter works with a ratio of infinite:1 what means that the input level may be theoretically be increased by any value without a change in the output level which can be specified using the threshold and gain slider.
  • Page 15 Filter features The DSP of the DAP 26 comes with many different filter types which are combinable as desired. In the following you can find some short information about the filters and their usage. Context between bandwidth and the „Q“ factor...
  • Page 16 PEQ I Parametric Equalizer Type I Full-parametric equalizer with different bandwidth for boost (normal) and cut (more narrow) to create more subtle changes in the audio material. We recommend using this filter for ‘standard’ audio requirements. Centre frequency Hz - 44 kHz Boost/cut + 12...
  • Page 17 Shelv- filter A shelv filter can be found in nearly every mixing desk, normally for low and high frequency adjustment. They can boost or cut a wide frequency range above (high shelv) or below (low shelf) the mid- frequency. Furthermore we added shelv filters with adjustable bandwidth (LSQ and HSQ) which are, corresponding to the value of the „Q“...
  • Page 18 High-pass and Low-pass To restrict the frequency response of an acoustic system in the low or the high end, the high pass (which actually means “low-cut”) and the low pass filter is implemented. Lowpass Filter 12 dB with adjustable “Q” factor mid frequency Hz - 44 kHz...
  • Page 19 mid frequency Hz - 44 kHz bandwidth „Q“ Notch Filter The notch filter filters out a frequency range defined by the mid frequency and the bandwidth. With a “Q” factor above 5 this filter is very narrow, allowing the user to filter out unwanted frequencies (i.e.
  • Page 20 All-pass filters do not change the frequency response of an acoustoelectric system at all but the phase response. They can be used to influence the phase response. This is a complex field in filter theory and so all-pass filters should only be used by engineers who have ‘enough’...
  • Page 21 The software - KME Control KME Control is a flexible software mainframe to be completed with different plug-ins which can control different K.M.E. products. At present there are plug-ins for the DAP 26 and the RCM Network Remote Control Module available.
  • Page 22 Select the modules you want to install within the mainframe. The modules may vary with different software releases. To work with the DAP 26 you must install the DAP plug-in. You cannot deselect the installation of the mainframe KME Control.
  • Page 23 After the installation has finished successfully, this window is shown. You can select if you want to start KME Control now by clicking the ‘Finish’ Button. You can also deselect the checkbox if you want to start KME Control later.
  • Page 24 ‚Remove KME Control’ and follow the de-installation assistant. Close KME Control first before trying to install a new plug-in or update. We also recommend closing all other programs during an installation process of new software. If you receive this message you can select ‚Yes’ without caring about your user presets stored in this folder to be deleted.

  • Page 25: Software Operation

    In this example the plug-ins DAP 26 and RCM are installed. Clicking on the DAP 26 symbol the plug-in will be loaded into the mainframe window. The plug-in may be activated more than once, in the actual release you can select up to four active windows (limited to screen capabilities).
  • Page 26 Example: Connecting two DAP 26 on different COM ports:...
  • Page 27 Functions in the main Window Menu bar: File Open Preset Opens a preset from a local drive of your computer. You are being asked if you want to overwrite the actual (which means the preset inside the active window) preset. If you are not sure that you want to discard your last changes, select ‘No’...
  • Page 28 KME Control this preset files will not be deleted! Close Closes the active DAP 26 plug-in window. A dialogue appears to ask if you want to save your last changes to the preset. Selecting ‚Yes’ opens the ‚Save’ dialogue, ‚No’ closes the plug-in window and ‚Cancel’...
  • Page 29 Enter the password again into the field ‘Confirm password’ and press ‘OK’. Your DAP 26 is now password-protected. When trying to connect the DAP 26 to the computer again you are asked for the password to enter. Without this password you can not change any setting in your DAP.
  • Page 30 Firmware Update For future upgrades of your DAP 26 you can use the firmware update which renews the DSP software inside the unit. The firmware update is easy to do. If you have received a new firmware file with an e- mail from the K.M.E.
  • Page 31 Remote Watch (only available in online mode) The function module ‚remote watch’ shows the front of a remote located DAP 26 with its meters and output gain pots in real-time. In this mode the user may control input/output levels or compressor/limiter thresholds from the remote location (only useful when connecting the units by CAN Bus for distances up to 400 meters).
  • Page 32 About DAP 26 The ‚About’ function shows the version number and revision of the DAP 26 plug-in. This information may be required contacting the K.M.E support. Click ’OK’ to close this window or click the blue link to visit the K.M.E. homepage...
  • Page 33 DAP 26 and your PC. If the connection is set-up, you are being asked if you want to copy the actual preset (which you probably just made in your PC) to the DAP 26. Click ‘Yes’ if you want to do so.
  • Page 34 Selecting ‚Yes’ opens the ‚Save’ dialogue, selecting ‚No’ starts the transmission of the presets from the DAP 26 to the PC. You can select the number of the preset to change. While you are in online mode you cannot change any settings in the DAP 26 by hardware.
  • Page 35 If possible deactivate all programs you do not need at the time you want to use your computer programming a DAP 26. Try using another COM port or use a USBtoRS232 converter connected to the USB port of your computer.
  • Page 36 Signal Flow The register tabs can be accessed out of all functional modules. The tab ‘Signal flow’ includes the routing matrix and the activation of all other audio modules by clicking. Magnitude The tab ‚Magnitude’ is active within the modules ‘Equalizer’ and ‘Crossover’ and shows the frequency response of the selected channel affected by crossover networks and / or filters.
  • Page 37 Functional units In/Out In this window the user can rename the input and output lines of the processor or name the actual preset and add information about author/date. The values are stored in the hardware unit and can be read out by other users. Gain In this window the input / output levels can be either set by mouse, writing the specified gain value in the ‘dB’...
  • Page 38 In this window you can set the time delays for all channels. This can either be done by clicking the up/down arrows behind the fields or entering the delay values into the fields. As delay units you can select µs, ms, s, cm, m and feet. While the sound velocity is depending on temperature, this field corresponds to the delay units cm, m and feet.
  • Page 39 DAP26 is online. Here is an example how to create a “classic”, mixing desk- type equalizer using the filter banks of the DAP 26:...
  • Page 40 Filters 1-4 are to be set to the values specified below. The remaining filter could be used as a Low- Cut i.e. at 80 Hz.
  • Page 41 ‘120’ into the ‘Freq.’ field or by using the mouse in the graphical ‘Magnitude’ display clicking on a curve and dragging it to the correct position. This operates in real-time when the DAP 26 is online. This example would look in the software like this:...
  • Page 42 As you can see the output channel 1 contains only the bass frequencies below 120Hz. The settings may be copied to channel 2 using the ‚Copy Parameter’ dialogue or setting it manually. To operate channels 3&4 as Mid/High outputs proceed as described above but use the ‘Low Cut’...
  • Page 43 For inexperienced users we do not recommend „experimenting“ around with the crossover section when you are online with the DAP 26 and a sound system is connected and running. In this case all settings are transmitted to the DAP in real- time and a ‘wrong’...
  • Page 44 The ‚Dynamic’ Window displays the response of the selected dynamic processor and includes a simple but informative level calculator. In the following some set-ups together with the corresponding curves are shown: a) Compressor The compressor behaves linear up to the adjusted ‚Threshold’ value. If this value is reached the compressor begins to control the level according to the compressing ‘Ratio’...
  • Page 45 b) Limiter A limiter describes a compressor with a compression ratio of 1:infinite what does mean that no level above the threshold is allowed to pass. Limiters are used for maximum protection of speaker components or maybe for securing maximum sound pressure levels prescribed by law.
  • Page 46 Attack Time Release Time This time-constants show the speed of the regulation process inside the compressor / limiter algorithms. A longer ‘Attack’ time will let some peaks pass before compression / limiting occurs which may increase the average SPL level while a short attack time will give more overload protection to the components.
  • Page 47 Appendix – navigation structure on the hardware unit...
  • Page 48 Appendix – Technical Data Technical Data DAP 26 / 96 Inputs Analog inputs 2 (XLR) Input impedance balanced 20 kOhm max. input voltage 12 / 18 dBU Outputs Analog outputs 6 (XLR) Output impedance balanced 130 Ohm max. output voltage...
  • Page 49 For your notes:...
  • Page 52 Auerbacher Straße 268 08248 Klingenthal / Germany phone +49 (0)37467 - 558-0 fax +49 (0)37467 - 558-33 www.kme-sound.com service@kme-sound.com Technical State February 2005. The content corresponds to the state at printing. Subject to technical alterations. Misprints and errors expected. Feb 2005 / SL...