Averager : Load
Press this button to choose a folder containing measurements.
Averager will attempt to load all files of all supported formats that are present in the folder. (Subfolders are ignored.) See also Import File Formats.
All loaded measurements appear in the upper right table. The first measurement is automatically tagged as the Reference measurement. All other measurements are referred to as Comparison measurements: this will be more obvious on the Averaging tab.
Some settings can be adjust in the table.
|Use||This denotes whether the measurement is used when calculating the average measurement. Unchecking “use” will remove the measurement from the averaging.|
|Ref||This denotes which measurement is considered the reference measurement. Click this to change the reference. Only one measurement can be chosen as the reference.|
|Gain (dB)||This shows the gain which is applied to the measurement, prior to averaging. For Gain modes other than “Use individual offset (dB),” the gains are display only. When “Use individual offset (dB)” is selected, the “Gain (dB)” fields can be edited in the table.|
|Delay (ms)||This shows the the delay applied to each measurement. The delays can be edited in the table. When editing the delay of the reference measurement, the change in delay is also added to the delay of all other measurements. The delays are also affected by the options in the “Delay” group. More on this below.|
|Invert||If this is checked, the measurement is inverted, prior to averaging.|
|Weight||The shows the weight multiplier applied to the measurement during the averaging. 1.0 is equivalent to using 100% of the measurement data. See the section on Averaging Modes for notes on exactly how the weight is used in each mode.|
There are four different options for adjusting the level of the measurements.
|Normalise magnitudes to max||Each measurement is adjusted so that the peak of the magnitude spectrum is at 0 dB. The average of the individual measurement gains is displayed to the right.|
|Apply common offset (dB)||Here a single gain for all measurements can be entered. The maximum level of the reference measurement spectrum is displayed to the right.|
|Use individual offsets (dB)||When selected, the “Gain (dB)” fields in the table can be edited.|
|Normalise to frequency range||Each measurement is adjusted so that the average absolute level, between Start (Hz) and End (Hz), is at 0 dB. The average of the individual measurement gains is displayed to the right.|
|Time Align all to Reference||This button will automatically adjust the delay of all comparison measurements so that their impulse responses are aligned with the reference measurement. The Delay (ms) fields in the table are updated.|
|Clear Individual Delays||This button removes any differences in the Delay (ms) settings by setting all the measurement delays to the value from Apply common delay (ms).|
|Apply common delay (ms)||Delay entered here is applied to all measurements, causing a bulk time shift in all measurements. Delay differences, between individual measurements – due to the Time Align all to Reference or due to manual editing of the table – are maintained.|
|Move Ref IR Peak to 0||This button moves the peak in the reference measurement impulse response to time = 0 by setting the “Apply common delay (ms)” setting to the negative of the “Ref peak delay.” All other measurements are moved by the same amount.|
|Sample rate||Here the sample rate of the project is set. All measurements are resampled from their original sample rates to this sample rate whenever this setting is changed. The averaged measurement is also saved with this sample rate.|