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 two products which can average hundreds of loudspeaker measurements – of any supported format – into a single response: Averager and FIR Designer.
Averager is a 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 includes the same averaging functionality as an optional step within the filter design workflow, generating a response only for use within FIR Designer itself.
Averaging filenames and settings can be saved as an ‘Averaging Session File’ which can be can be shared between 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. All measurements are resampled to the FIR filter design sample rate as they are loaded.
Averager v1.0 (learn more)
The Measurement Averaging Tab in FIR Designer v2.6:
- 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.