Loudspeaker Multiple Measurement Averaging

Combining multiple measurements, especially for spatial averaging, can result in a more accurate filter design & overall system response. Eclipse Audio has three software products – Averager, FIR Designer M and FIR Designer – which can average an unlimited number* of loudspeaker measurements into a single response, subject only to computer memory limits.

Measurements can be in any supported format from tools such as Smaart, Systune, Easera, Klippel & others.

Averager is a free stand-alone software application enabling the creation of an averaged response for use in any other audio & plotting tools (ie. not just those developed by Eclipse Audio).

FIR Designer M & FIR Designer both include the same averaging functionality (as found in ‘Averager’) as an optional step within the filter design workflow. Generate a response for export or for use within the program (from the Import tab).

Averaging filenames and settings can be saved as an ‘Averaging Session File’ which can be can be shared between FIR Designer M, FIR Designer & Averager.

About Measurement File Sample Rates

Measurement files can have different samples rates and don’t have to match the FIR filter design sample rate when using FIR Designer M or FIR Designer. All measurements are resampled to the FIR filter design sample rate as they are loaded.

AVERAGER | Loudspeaker Measurement Averaging
FIR Designer | Loudspeaker Measurement Averaging*

*earlier version of software shown in video

Loudspeaker Measurement Averaging in FIR Designer (or FIR Designer M):

  • Select the ‘Measurement Averaging’ tab
  • Select a directory of measurements.
  • Choose a “Reference” measurement. All other measurements are automatically time aligned to this reference.
  • For each of the other “Comparison” measurements, adjust the time-delay, average weighting and polarity.
  • Select one of four averaging modes: Complex, Power (flat, zero phase), Power (minimum phase) and Power (minimum phase + excess reference phase).
  • Finally, in FIR Designer copy the average measurement to the Import tab for use in your FIR or IIR+FIR filter design, or export the average response to file. (Export is not shown in video below.)