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Spectral Audio is an audio frequencyanalyzerthat uses your phone/tablet mic input.Data sampled at 44.1 kHz is used to produce length 2048 FFTsanddisplayan energy spectral density from 0-22 kHz.Technical Specs- Frequency Range 0-22 kHz- 2048 pt FFT- Frequency resolution 21.5 Hz- DC component removed- Hamming Window- Sampling Rate 44100 samples/sec- Sampling Period 46 ms- Smoothing Function: 5 pt triangular moving averageFeatures- Linear and Log amplitude- Smoothing Function- Peak Identifier- Hold function- Local Zoom function (X 8)- Selectable Gain - 0, 5, 10, 15 dB