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A transfer function is a total measurement of the amplitude and phase response of an audio device.

A key part of an accurate transfer function is the removal of the input test signal response from the final measurement. This is done by passing a sample of the input signal to the second channel of the analyzer and removing its response from the response of the device under test.

You should use logarithmic amplitude scaling; subtracting two logarithmic quantities equates to division of their ratio values.

Mode: Real-Time

Views: Spectrum, Phase

Sampling Rate: At least twice the highest frequency produced by the device under test

FFT size: 4096 typical

Averaging: 4

Peak Hold: Off

Smoothing Window: Hanning

Dual Channel Spectral Processing: Real Transfer Function Left/Right"

Sampling Format: 16 bit Stereo

Frequency scaling: your choice

Amplitude scaling: Logarithmic

Spectral Weighting: flat

The spectrum display contains the amplitude response of the device and the phase display contains the phase response.