SpectralLab

Fourier Analysis Dashboard

Spectral decomposition of input_audio.wav

Open WAV File

Peak Frequency

452.4 Hz

Strongest component (A4/A#4)

Duration

1.01 s

Total track audio length

Sample Rate

44.1 kHz

44,100 Hz PCM mono

Total Samples

44,544

16-bit signed integers

Frequency Spectrum (FFT)

Magnitude distribution from 0 Hz to 12000 Hz

Waveform

Time-domain representation showing normalized amplitude

Time Domain

Dominant Peak Frequencies

452.4 Hz

Harmonic peak

Mag: 1018.35

43.6 Hz

Harmonic peak

Mag: 455.09

227.7 Hz

Harmonic peak

Mag: 427.53

340.6 Hz

Harmonic peak

Mag: 418.01

121.8 Hz

Harmonic peak

Mag: 407.01

Spectral Insights

The primary frequency of this wave is at 452.4 Hz. In music theory, this aligns very closely to the note A4 (standard concert pitch is 440 Hz) or a flat A#4 (466 Hz).

We notice a substantial peak at 227.7 Hz. This component is almost exactly half of the peak frequency, representing a strong sub-octave harmonic. This is characteristic of rich instrument synths or voiced vocal cords.

What does FFT do?

The Fast Fourier Transform takes raw digital sound samples (amplitude fluctuations over time) and separates them into individual sine wave frequencies. This allows us to see the exact frequencies that make up a sound.