Summary of Contents for RAM LMS 244
- Page 1 LMS 244 Digital Controller Loudspeaker Management System SOFTWARE MANUAL P-85464-074 © 2004 by C.E. Studio-2 s.l. - Spain (EEC) QXPDQXDoc http://www.ramaudio.com 11/04 e-mail: support@ramaudio.com...
- Page 2 LMS244 controller, please inform us: we are always open to any suggestion that might improve our products. For more information about RAM Audio products and to download the latest version of the LMS244 software please visit our web site: www.ramaudio.com 1.
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Page 3: Software Installation
RAM Audio LMS244 Vx.x.To run the program, select PROGRAMS in the START menu. In the PROGRAMS window, select RAM Audio LMS244 Vx.x and then LMS244 by clicking on its icon. If you have created a direct access to the program from the desktop, simply double-click on the icon. - Page 4 RAM Audio LMS244 Digital Controller The first window requests that you indicate the PC serial port to which your LMS244 processor is connected. You can select one of the five proposed options: - Working without a connection (Offline) - Processor connected to COM1.
- Page 5 The removal of the LMS244 software from your computer conforms to the usual Windows practice for removal of programs. From the Control Panel, choose Software and then Add/Delete Program. Select RAM Audio LMS244 and select Add/Delete. It is advisable to keep a safety copy of all configuration files that have been created (with extension *.dsc) in order to be able to use them at a later date.
- Page 6 RAM Audio LMS244 Digital Controller The configuration Icons allow immediate access to any of the configuration screens. The tool bar offers such options as Read, Create, Save configurations and all options related to the communication with the unit: connection, DSP Operating System updating, password protection, keyboard locking and storing configuration to memories.
- Page 7 RAM Audio LMS244 Digital Controller Now that you are familiar with the functions of the buttons on the main screen, you can begin to work with the program. First of all, to prevent future loss of configurations, you should give a name to each project, or the equipment you are setting up.
- Page 8 RAM Audio LMS244 Digital Controller 3.4. Input & Output Configuration Once you have defined the mode you wish to work with, you will start to configure each of the operating parameters of the processor. Firstly, you should identify the inputs and outputs you are going to use.
- Page 9 RAM Audio LMS244 Digital Controller 3.6. Input & Output Delay The following Icon in the input path is the one dealing with Delay. (The same Icon can be found in the output paths.) This Icon opens the following "Input & Output Delays" window: Here the general delay for channels A, B and M can be adjusted.
- Page 10 RAM Audio LMS244 Digital Controller The precise adjustment of the delays is achieved by selecting the corresponding fader by clicking on it with the mouse, and then using the cursor left and right keys on your computer keyboard. This method allows adjustment in steps of 0.7 cm.
- Page 11 RAM Audio LMS244 Digital Controller - This process can be repeated for filters from 1 to 6. - Switching between Mag(nitude) and Phase displays the amplitude or phase of the EQ design. - The information bar situated at the bottom of the window shows the real-time mouse position in relation to frequency and amplitude (dB) or phase (degrees).
- Page 12 RAM Audio LMS244 Digital Controller Normal Configuration The four columns Xover1 to Xover4 represent the crossover filter configuration of the four outputs. Each column is divided into Low and High differentiating between Low cut-off (High-pass filter) and High cut-off (Low-pass filter) allowing the configuration of the individual cut-off frequencies, the type of crossover filter used and the Order of each filter.
- Page 13 RAM Audio LMS244 Digital Controller Once the filter is set to Custom mode, it is possible to switch to the Custom window and modify the values of each filter of second order independently. You will also be able to modify the values of each filter in Low Order (low cut-off, High-pass) and High Order (high cut-off, Low-pass) as well as selecting the crossover filter to be modified via the Xover box.
- Page 14 RAM Audio LMS244 Digital Controller The different elements of the screen are as follows: To edit the EQ of each output, select the corresponding output in the section Edit and ensure that it's View option is activated. As with the Xover screen, the selected EQ curve will appear in the graphic window.
- Page 15 RAM Audio LMS244 Digital Controller The Speaker Data Icon in the window Output Equalization will allow you to import ASCII files containing the measurement data of the transducer/system connected to each output: Care should be taken to adjust the Reference Level to 0 dB correctly. Here, the average dB value that you consider you have in the data files should be entered.
- Page 16 RAM Audio LMS244 Digital Controller MLSSA : To obtain the necessary ASCII file with MLSSA, it is necessary to make the measurement, transfer to FFT to get the response in frequency Transfer Function Magnitude and visualise it with some smoothing. Once the frequency response is on screen, go to the option Transfer, Export, Bode, select the phase (normally Actual-phase), select a resolution of at least 1/6 Octave, give a name to the file, save it with a .txt extension.
- Page 17 13.33 33.80 58.70 14.41 34.30 58.40 15.58 35.00 57.90 16.84 35.70 57.30 18.20 36.70 56.40 19.67 38.00 55.30 21.27 39.30 53.50 IMP / LAUD : option not available. LMS : option not available. OTHER FORMATS : Please contact RAM Audio...
- Page 18 RAM Audio LMS244 Digital Controller General considerations in realising measurements It is extremely important to accurately realise the measurements of the transducers for the subsequent results to be reliable and valid. The following list can be considered as a useful guide in obtaining good measurement files.
- Page 19 RAM Audio LMS244 Digital Controller The top row of icons gives access to each output. The icon showing characters in red corresponds to the selected output: all values of the different parameters (limit, ratio, gain, knee, attack and release times, etc…) appear on the faders. The graph on the left shows the dynamic curve, expressing the ratio between the input and output signal levels in dBu.
- Page 20 (occurring the moment the signal passes the threshold). Their performance can be audibly noticed affecting the natural dynamics of music. To avoid this problem, especially in multi-way P.A. applications, RAM Audio uses Continuous Ratio Increment (C.R.I.) dynamic curves in which the threshold changes from a defined angle to a continuous curve that perfectly links the linear area of 1:1ratio processing with the compression or limit area in a configurable range.
- Page 21 RAM Audio LMS244 Digital Controller Automatic Time Constants can be selected in which case the faders for attack and release time become deactivated. Here the program automatically selects attack and release times in relation to the crossover's inferior frequency cut-off. The following table charts the time constants selected by the...
- Page 22 TO POWER HANDLING CAPACITIES AND IMPEDANCE OF LOUDSPEAKERS OR TO THE GAIN, SENSITIVITY AND OUTPUT POWER STRUCTURES OF POWER AMPLIFIERS. FOR THIS REASON RAM AUDIO ACCEPTS NO LIABILITY FOR ANY DAMAGE TO ANY PART OF THE OPERATED SYSTEM CAUSED BY THE ADJUSTMENT OF LIMITERS.
- Page 23 RAM Audio LMS244 Digital Controller 4. LMS244 Configuration 4.1. Tool Bar Once the parameters of a system have been defined it is necessary to transfer the configuration to the LMS244 where it can be stored to be used exactly as it has been programmed.
- Page 24 One of the main advantages of the LMS244 is it's use of Flash data memory. This enables the remote updating of the DSC's operating system software ensuring a constant state-of-the art device. Immediately on their release, OS-updates will be available for download from the RAM Audio web site www.ramaudio.com Verification of the current version of the LMS244 Operating Software set in the device can be obtained via the tool bar icon Get Version.
- Page 25 RAM Audio LMS244 Digital Controller Before commencement of the update process a Warning window will appear informing the user of the imminent process and allow the possibility to confirm or cancel the action. Once the process is completed the LMS244 will automatically re-boot with the new version.
- Page 26 RAM Audio LMS244 Digital Controller 4.4 Configuration Report It is possible to generate a detailed configuration report by selecting File and Report from the sub menu. This report is in ASC11 format and can either be saved to disk or printed.