Fourier Sound & Harmonic Acoustics Synthesizer

⚡ Sound Timbre Presets

📈 ADSR Envelope Contour

Attack 0.05s

Decay 0.20s

Sustain 0.70

Release 0.40s

📊 Synthesis Telemetry

Audio State: Standby

Fundamental Pitch: A4 (440.0 Hz)

Harmonic Count: 16 Overtones

Peak Amplitude: 1.00

Spectral Centroid: 440.0 Hz

Waveform Profile: Pure Fundamental Sine

🌊 Time-Domain Oscilloscope & Frequency FFT Spectrum

60 FPS Acoustic Render

WAVE: Complex Sum TIME DOMAIN

SPECTRUM: 0 - 8000 Hz FFT OVERTONES

🎛️ 16-Bar Harmonic Overtone Balance Matrix (Fourier Partials)

🎹 Interactive Acoustic Keybed (Play or Click)

Octave 4 (A4 = 440 Hz)

How harmonic coefficients change synthesized sound

Your browser does not support video.

Read the explanation

The source uses sixteen harmonic coefficients. Harmonic one oscillates at the fundamental; harmonic two at twice it; harmonic three at three times it. At the displayed A four fundamental of four hundred forty hertz, these frequencies are four hundred forty, eight hundred eighty and thirteen hundred twenty. Adding the third harmonic with amplitude zero point three three reshapes a sine wave while retaining its fundamental periodicity. The source square preset keeps odd harmonics and removes even harmonics. Its first five coefficients are one, zero, zero point three three, zero and zero point two. The violin preset instead includes the second harmonic at zero point five and the third at zero point two five. The animated coefficient bars compare actual source preset values. These are limited synthesized approximations, not recordings or exact instrument models. The source WAV export synthesizes two seconds at forty four thousand one hundred samples per second: eighty eight thousand two hundred mono samples. It always uses four hundred forty hertz, scales the harmonic sum by zero point three and clamps the result before sixteen bit encoding. That path does not apply the selected envelope. Beat mode in the live engine adds a second oscillator three hertz above the chosen pitch. Keep the live sound, visual harmonic coefficients and fixed export equation distinct.