LMA8 Mic/Line Preamplifier
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FFT distortion analysis
FFT analysis has the ability to detect distortion that is buried in the noise. Noise is a statistical phenomenon, and by
reading several samples and adding them together, the FFT analysis is able reduce the noise to its average value, thus
revealing the distortion components otherwise buried in the noise.
Below are plots of the distortion characteristics at various gain settings. Distortion levels are listed for 2nd to 10th
harmonic and are quantified in dBFs. As a guideline, 120 dBFs equals 0.0001 %, 140 dBFs equals 0.00001 %
Gain +10 dB, frequency 1 kHz. The rms sum of all distortion components (THD) is 0.00013 %
