System RequirementsRegistering WinMLSThe first measurements walk-through
How to get a quick explanation of the buttons and menus?Turning off Windows Notification SoundsFinding and Preparing the Volume ControlMeasurement 1: Loop-back measurement of the sound cardPreparationMeasurement procedureChanging plot settingsVerifying the sound card measurementSound Card TroubleshootingSaving the settingsMeasurement 2: A simple loudspeaker measurementMeasurement 3: Measuring using loop-backPerforming a 2-channel measurementRoom Acoustics IntroductionShortcut keysStructureTroubleshooting and Known IssuesTroubleshootingWinMLS mixer not working in Windows XP problem solvedMy measurements look too good, why?When changing the preferred sound device in windows multimedia properties, WinMLS does not work properly, how to fix this?I can hear feedback, how can it be turned off?Why does a small change the in volume settings in WinMLS give no effect?Trouble with WinMLS protection.Problems with IBM TP 600X laptop running Windows 2000The plot background colors look strange, why?An error message is given when trying to perform a measurement, why?IssuesDouble-clicking in the plot will not open the plot type settings dialogOpening/inserting .txt-files with first column x-axis and second column y-axis is not yet supportedRoom AcousticsPlacing several toolbars together at the very top or bottom of WinMLS may not give same positioning on restart.If the system is low on memory, e.g. after opening several programs, WinMLS may become unstable and crash.Abnormal termination on shutdownLoading chart filesSetups toolbarExiting WinMLS when it is not maximizedMeasurement->Set Automatic Input Level(s) is slowPlot settings toolbar supports up to 4 decimals.Auto-scaling of y-axis maximum valueA tip that will avoid WinMLS to crashSpecial case: If two plots are displayed showing the same plot type.Opening/inserting 24 bits .wav-files is not possible in this versionRefresh All will not update the colors correctly if there exists several curves of the same measurement.If several curves are in the plot, it may happen that an error will occur in plotting Guidelines.Measurement Settings toolbarDisabling emphasis and system correction buttonsReal part and imaginary part of frequency response/spectrumVolume and Input Level(s) Dialog button in Standard ToolbarSound CardsRecommended Sound CardsGeneral information about the Digigram cards (VXpocket, PCXpocket, PCX9 and VX 222)Digital input/outputNote on installation of the driverHow to use this sound card for doing calibrated measurements?How to switch from line input to microphone input?Do you want exact initial time delay?Standby modeBreakout cablesHeating of the card may slightly affects the absolute level calibrationSound Devices that have been tested not work with WinMLSSound Devices that have been tested to work with WinMLSPCI cardsSek'd Prodif 96 ProLynxTWOWaveterminal 192XDelta 1010LTDigigram VX222TB Santa CruzTerratec EWX 24/96Card DeluxeRME Hammerfall DIGI9652Sonorus STUDI/OMULTIWAV PRO18Soundtrack 128 DDMAMidiman DMAN 2044SEK'D SienaSEK'D ARC88Ensoniq Audio PCISound Blaster PCI 64Sound Blaster PCI 128SB Live ValueSB Live PlatinumISA cardsTurtle Beach Monterey/TahitiTurtle Beach Fiji/PinnacleSound Blaster AWE 64Sound Blaster AWE 32Sound Blaster 16SEK'D ARC44Crystal CS32BA11ESS 1868CARDD PLUSTurtle Beach Multisound ClassicUSB DevicesFirewire DevicesPCMCIA cards (laptop)Sound Chips/LaptopsFAQ: MeasurementWhat is the easiest way of performing a measurement?How to perform a 1-channel measurement (MLS) using WinMLS?How to check that my sound card measurement is correct?How to perform a triggered measurement?How to calibrate the input of the measurement system?How to perform relative calibration of mixer input levels?How to perform absolute calibration of input level?How to calibrate the output of the measurement system?How to perform relative calibration of mixer output levels?How to perform calibration of absolute output level?How to measure the initial time delay (the distance between the loudspeaker and the microphone)?How to correct for the influence of the measurement system?How to do get logical filename suggestions of when performing several measurements?How to get fine resolution on the WinMLS mixer slider?How to use a sinusoidal excitation signal?What format is recommended for saving measurement data?How to convert a measurement file, e.g. of extension .wmb to .wav?How to improve signal-to-noise ratio for low frequencies?How to add pre-filtering (emphasis) to the excitation signal (MLS)?How to access a measurement from memory?How to read WinMLS files in Matlab?How to run WinMLS as a function from Matlab?How to run WinMLS as batch file?Can a given setup be automatically called using DOS switches?What is the highest sampling rate available (important for e.g. scale modeling in room acoustics)?Can multi-channel measurements (>2 channels) be performed using WinMLS?FAQ: Plotting and post-processingPlotting - general informationHow to plot a measurement?How to display two plots simultaneously, e.g. the upper plot displaying frequency response and the lower phase response?How to set the plot type (to e.g. phase response) and determine what measurement is to be plotted?How to access the settings for the plot type?If a setting is changed for the displayed plot-type, how are the curves belonging to the plot updated?How to change y-axis scaling?How to filter the measurement, e.g. using a BandPass filter?If waterfall is plotted, how to read the waterfall slice values using the cursor?If there are many lines in the waterfall plot, how to space the lines less close together?When plotting waterfall, how to select the start point?How to set the time data window when plotting in frequency domain? (determine part of the time data to be used when transforming to the frequency domain)?How to speed up the plotting?Where are the cursor values (x,y) in the plot displayed?Where is the wavelength displayed?How to save the data in the plot?How to save the plot as a picture?How to view and manipulate the data of the plotted curves?Why are plot toolbar axes limits not updated when a plot is zoomed or scrolled?How to make calculations, such as average and difference on plotted curves?How to plot a transfer function (e.g. room or loudspeaker measurement) in octave or third-octave bands?How to plot spectrum in octave or third-octave bands?How to validate numbers typed in the Plot Toolbar?Plot Chart SettingsHow to change the curve type?How to change the curve style (color, type and width)?How to plot figures in black and white only (e.g. for publishing)?How to change the order of curves?How can I delete a single curve?How to choose between plotting several curves and a single curve?How to display one single curve as Solo?When printing a plot, why is the plot squeezed to the left corner?How to add legend, displaying a list of the curves that are in the plot?How to “turn off” a single curve from the plot without deleting it?How to zoom the plot using the mouse?How to access zoom options, e.g. to turn the mouse zooming on/off ?How can I move the curves away from the nag screen in the personal version?How to scroll the plot using the mouse?How to turn on and modify gridlinesThe y-axis labels show only zeros, how to change this?How to set the axis labels format?How to set the axis labels increment?How to display the numerical values of the Magnitude Frequency Response Guidelines?How to add a text box to the plot?How to add a cursor (cross) that follows a curve?How can curves in the plot remain so that they are there when the program is restarted or a new window is opened?FAQ: Room AcousticsHow to measure room acoustics?How are room acoustics parameters presented?How can the Room Acoustics Parameters Grid be copied to a spreadsheet (e.g. Excel)?How to fix problems with the formatting when pasting room acoustics parameters to Excel?How to fix problems with the formatting when reading a room acoustics parameters text-file to Excel?Plotting: How to compute and plot room acoustics parameters such as reverberation time?How to specify two measurements for computing room acoustics parameters?Specifying the secondary measurement does not help, why?Limitations when plotting parameters needing two measurementsNumerical display: How to compute and display room acoustics parameters in a grid?How to compute one parameter only, e.g. reverberation time?How to export the computed parameters from the “Room acoustics parameters” grid?How to change the bandwidth, e.g. obtain the reverberation time of the broadband measurement?How to display room acoustics parameters automatically after performing a measurement or inserting measurement file(s)?How to automatically compute room acoustics parameters from several measurements?How to average or doing other calculations on room acoustics parameters obtained from several measurements?Is there a way of automatically sending measurement channel two to the lower plot or insert measurements in both upper and lower plot in one operation.How to change the x-axis of the Room Ac. Parameters plot type when plotting octave band parametersFAQ: ApplicationsHow to measure loudspeaker frequency response uncalibrated?How to measure loudspeaker frequency response and use SPL as vertical axis?How to measure levels, such as in octaves and dBAHow to use WinMLS as a level meter for measuring SPL values in octave, 1/3 octave, dBA?If I have measured an impulse response, how can I find the level (for example in dBA)?How to display in octaves?How to display in dBA?How to display several measurements (e.g. for comparison and for saving the data)?How to measure speech transmission indexes STI or RASTI?How to measure loudspeaker impedance?How to find the level difference of two measurements as function of frequency?How to find the level difference between stereo speakers?Violin AcousticsFile Menu ReferenceNew GroupInsert in Active Group...Open Group...CloseSave Active Measurement As...Browser for saving 1-channel measurementBrowser for saving 2-channel MeasurementBrowser for saving multi-channel (>2 channels) MeasurementSave Active MeasurementSave Data in Active Plot As...Save Active Plot As...Print Active PlotPrint Preview Active Plot...Convert Measurement(s)...ExitEdit Menu ReferenceView Menu ReferenceVolume and Input Level(s) DialogMeasurement Selection ToolbarMeasurement modeMLSMLS (scope)No excitation (scope)Trigged, no excitation (scope)Sinusoid (scope)Excitation from text fileDelete unplotted measurements from memoryActive measurement in upper plotUpdate both plots with the same measurementMeasurement in lower plot or reference measurementSelect “lower plot measurement” or “reference measurement” in combo boxMeasurement Settings ToolbarNumber of Channels to MeasureSampling FrequencySequence OrderLength of Measured DataNumber of AveragesTotal Meas. TimeNumber of sequences to pre-sendSequence TypeMeasurement System CorrectionPre-emphasisDe-emphasisType of emphasisList of Curves ToolbarDeleting curve(s) from the plotDragging curves to change the orderChange curve typeDisplay the curveChange the curve colorPlot ToolbarSetting the lower x-axis limitSetting the upper x-axis limitSetting the lower y-axis limitSetting the upper y-axis limitAuto-scale the plot in all directionsDisplay one or two plots in the windowPlot Type in Active PlotSettings for the Active PlotFrequency Plots ToolbarTime Window ToolbarSetting the lower window limitSetting the upper window limitWindow lengthWindow x-axis unitTime data window typeDisplay time window in time data plot typeSetups ToolbarSelect a new Measurement SetupSave Measurement SetupSave Post-processing Setup when Measurement Setup is savedSelect a new Post-processing SetupSave Post-processing SetupStandard ToolbarStatus BarMeasurement Menu ReferenceStart MeasurementCancel MeasurementTest Current LevelsSet Input Volume(s)Set Output VolumeMeasurement Information…Delete Unplotted MeasurementsSound Card SettingsMixer and Synchronization SettingsInput SettingsOutput SettingsSound Card Specific SettingsAdvanced settingsHardware Calibration…Input Absolute Level CalibrationOutput Absolute level calibrationRelative calibration of mixer inputRelative calibration of mixer outputMeasurement System Correction FileMeasurement Settings Toolbar (also found in View menu)Sinusoid Settings…Advanced SettingsMeasurement Tasks…Defaults for Saving...Measurement Setup...Plot Menu ReferenceAdd Curve(s)Delete All CurvesHold plotted curvesMenu: Solo Active Measurement CurveAuto RefreshRefresh ActiveRefresh AllSelect Plot Type(s)/Measurement(s)...Number of plotsPlot Type in Primary (upper) PlotActive measurement in Primary (upper) PlotPlot Type in Secondary (lower) PlotActive measurement in Secondary (lower) PlotChart Settings for Active Plot...Plot Type Settings: OverviewPlot Type Settings: Time Data…X-axis settingsY-axis settingsY-axis scalingVelocity of soundShow time window for active measurementRemove DC-component (0 Hz)Processing TypeNo processingIntegral (Step response)Double integralDerivativeDouble derivativeCumulative energyFilteringPlot Type Settings: Integrated Time Data (Step Response)...Plot Type Settings: Energy-time CurvePlot Type Settings: Schroeder Curve…Plot Type Settings: Frequency Response/Spectrum...X-axis settingsY-axis settingsGeneral Frequency Domain SettingsTypeSmoothing or IntegrationGuidelinesGuidelines settingsFrequency rangeDisplay numerical valuesGuidelineMaximum GainMinimum GainAverage GainAverage gain offset.Guideline styleCompensation of MagnitudeShift/NormalizationPlot Type Settings: Phase Frequency Response/Function...X-axis settingsY-axis settingsGeneral Frequency Domain SettingsPhase typeSmoothingRemove delay in frequency rangeSubtract delayPlot Type Settings: Group Delay...Plot Type Settings: Waterfall...X-axis settingsY-axis settingsZ-axis settingsWaterfall layoutEnergy-Time-Frequency (ETF) calculation settingsModeCyclesFFT shiftFloorGeneral Frequency Domain SettingsSmoothingWaterfall microphone compensationReference to sliceShift magnitudePlot Type Settings: Room Ac. Parameters...TypePlotting dependency on SNRCalculation OptionsParameter SettingsDisplay Signal to Noise Ratio (SNR)Plot Type Settings: Levels...General Frequency Domain Settings...Active measurement settingsReference measurementFourier transform size_Menus and Dialog Boxes-4_Menus and Dialog Boxes-5_Menus and Dialog Boxes-6_Menus and Dialog Boxes-7VariousDefault Curve StylesSelecting curve colorSelecting curve width and styleDisplay curve belonging to active measurement with different widthWrap indexWhite background on copy/printAdvanced Plot Settings…Post-Processing Setup...Room Acoustics Menu ReferenceCalculateCalculation Options...Microphone type(s)Single omni-directionaDual omni-directionalOmni-directional and figure-of-8Closely spaced omni-directional pairBinaural pairBandwidthIntegration optionsResult of calculationParameter Settings...Decay range (SNR)Decay timesEarly energy ratiosCentre timeStrengthDirect energy optionsWindow active responseUser specified reference levelReference level calculation procedureLateral parametersInteraural crosscorrelationStage parameterSpeech transmission indices and modulation transfer functionSource to receiver distanceWindow Menu ReferenceHelp Menu ReferenceGlossary of Terms