Averager : Save

For importing into FIR Designer, save the average as Transfer function – freq,magdB,phaseDeg (columns) with Linear (FFT) frequency spacing.

File Controls


This dropdown provides a selection of output file formats for the average measurement.

Impulse Response (column, decimal)


Two columns: time (seconds) and sample value.
Impulse Response (row, decimal)


Two rows: time (seconds) and sample value.
Transfer function – FFT real, imag (columns)


Three columns: linear frequency (Hz, from 0 to nyquist), real and imaginary values.
Transfer function – freq,magdB,phaseDeg (columns)


Three columns: log spaced frequency (Hz), magnitude (dB) and phase (degrees). The log spacing is specified using the Frequency Spacing drop-down.
Binary file – Impulse Response (32 bit, float)


Impulse response samples written as 32 bit floats.
WAV file – Impulse Response (16, 24 or 32 bit, int) Impulse response samples written in fixed point.

Note: IR values greater than ± 1.0 will be clipped. A warning is displayed below the Save button.

Frequency Spacing

Sets the fractional octave frequency spacing for the Transfer function – LOG freq,magdB,phaseDeg (columns) file type.

IR start (ms) & IR end (ms)

These fields specify the region of the impulse response that is written to file.

Append FIRd T/A number

When checked, a number is appended to the save filename which indicates the sample location of time=0, relative to the start of the file. When the file is imported into FIR Designer and FIR Designer 2, the impulse response is shifted to maintain time=0. For more details see Import File Formats.


Output Power – Average Input Power

This gives an indication of the change in level from the input measurements to the average measurement. When applying gain changes to the input measurements, and averaging measurements for multi-way designs, this may be useful in maintaining relative levels between loudspeaker drivers. (The calculation assumes pink noise input; that is 1/f summation across frequency.)

The AvgPWR-InPWR (dB) field in the adjacent table uses the same calculation method.

Measurement Table

All loaded measurements appear in the upper right table along with indications of which measurements are used in the average, and the Reference measurement.

View If checked, the measurement (with gain, delay and invert applied) appears in the lower plot, along with the average measurement.