SASLab Manual
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Smooth The data record is filtered using a moving average algorithm. The number of consecutive samples specified in the Average over list box are accumulated and divided by that number. The corresponding bandwidth of the averaging process is displayed at corresponds to.
Power spectrum If the displayed data record is an amplitude spectrum, it can be converted into a power spectrum using this command.
Normalize to maximum  The displayed data record is normalized to its maximum. The maximum will equal to 1 Volt. If the data record is a power spectrum the maximum will be 0 dB.
The following menu items are only available in conjunction with the Edit function of the Time Domain FIR Filter or Frequency Domain Transformation tool:
Reset Frequency Response Resets the frequency response to 1.0 at all frequncies.
Invert Frequency Response Inverts the frequency response. Use this command to generate compensation FIR filters based on measured frequency responses.
Divide by another Frequency Response... Divides the currently loaded frequency response by another user-defined frequency response (available when the logarithmic Frequency Response display option is not activated).
Subtract another Frequency Response... Subtracts another user-defined frequency response from the currently loaded frequency response (available when the logarithmic Frequency Response display option is activated).
Use this command to compensate for nonlinear speaker frequency responses. Select here the .flf frequency response file of the speaker that has been measured using a sine sweep signal and a 1/4" or 1/8" measurement microphone having a flat frequency response.
Frequency response files can be created from the main window drop-down command Analyze > One-dimensional transformations... > Frequency response, sine sweep mopno > File > Data export > Save as .flf file...
Normalize Frequency Response Normalizes the frequency response to 1.0.
Smooth Frequency Response The frequency response is filtered using a moving average algorithm.
Resample Frequency Response The frequency resolution of the frequency response is reduced or increased. Enter the desired resolution into the new frequency interval edit field.
Lock frequencies If activated, this option prevents modifying the frequency values of the sample points.
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