Signal Processing, DSP & Hardware
Real-time spectrum analyzer, FFT, spectrogram, oscilloscope, waveform visualizer, filter calculators (low/high/band-pass/notch), EQ frequency guide, crossover calculator, phase tools, and harmonic analysis — for audio engineers, DSP students, and electronics professionals.
Available Tools
Audio Spectrum Analyzer
Real-time FFT spectrum analysis from your microphone with logarithmic frequency axis, adjustable FFT size, peak hold, A/C weighting, and screenshot export.
Launch tool →FFT Frequency Analyzer
Configurable Fast Fourier Transform with selectable window functions (Hann, Hamming, Blackman), magnitude + phase display, and frequency bin resolution control.
Launch tool →Waveform Visualizer
View real-time audio waveforms from your microphone with adjustable time scale, trigger level, pause/snapshot, and file upload mode for offline analysis.
Launch tool →Sound Visualization 3D Tool
WebGL-powered 3D spectrogram waterfall, reactive particles, and sphere visualizations driven by live microphone or uploaded audio files.
Launch tool →Oscilloscope Tool
Virtual oscilloscope with time/div and volts/div controls, trigger settings, dual-channel stereo mode, measurement cursors, and XY Lissajous display.
Launch tool →Real-Time Spectrogram
Scrolling frequency-vs-time waterfall display with customizable color maps, adjustable frequency range and time resolution, and PNG screenshot export.
Launch tool →Frequency Heatmap Generator
Upload audio files to generate full spectral heatmaps with customizable color scales, frequency/time axis labels, dB range selector, and PNG/SVG export.
Launch tool →Frequency Response Curve Tool
Measure or plot frequency response curves with sweep measurement, octave smoothing (1/3, 1/6), target curve overlay, and deviation highlighting.
Launch tool →Resonance Curve Plot Generator
Plot amplitude-vs-frequency resonance curves from center frequency and Q factor. Adjustable damping, multiple curve overlay, and −3 dB bandwidth markers.
Launch tool →Low-Pass Filter Calculator
Design RC, RL, and active op-amp low-pass filters. Calculate component values from cutoff frequency with Bode magnitude/phase plots and step response.
Launch tool →High-Pass Filter Calculator
Design RC, RL, and active op-amp high-pass filters. Butterworth and Chebyshev options with component values, Bode plots, and frequency response curves.
Launch tool →Band-Pass Filter Calculator
Design bandpass filters from center frequency and bandwidth. Q factor calculation, RLC component values, active filter topology, and Bode magnitude/phase plots.
Launch tool →Notch Filter Calculator
Design notch (band-reject) filters to remove specific frequencies. Twin-T and active topologies with 50/60 Hz hum removal presets and Bode plot output.
Launch tool →Equalizer (EQ) Frequency Finder
Interactive frequency spectrum with labeled EQ zones, instrument frequency ranges overlay, problem frequency guide, and listen-and-sweep identification tool.
Launch tool →Crossover Frequency & Slope Calculator
Design 2-way and 3-way speaker crossovers with Butterworth, Linkwitz-Riley, and Bessel filters. Component values for passive networks and combined response plot.
Launch tool →Subwoofer Crossover Frequency Optimizer
Find the optimal crossover point for your subwoofer based on main speaker −3 dB point, room size, and slope order with visual sub + mains frequency blend.
Launch tool →Subwoofer Frequency Calculator
Calculate sealed vs. ported enclosure tuning from Thiele-Small parameters. Port length/diameter calculator, −3 dB point estimation, and box volume optimizer.
Launch tool →Bass Frequency Finder
Interactive chart mapping bass notes to Hz with instrument ranges (bass guitar, kick drum, sub-bass synth), audio playback, and EQ recommendation zones.
Launch tool →Audio Phase Alignment / Inversion Tool
Check stereo phase correlation (−1 to +1), toggle polarity inversion, and adjust time delay alignment in samples or milliseconds with visual correlation display.
Launch tool →Phase Frequency Analyzer
Plot phase response vs. frequency from audio input with group delay calculation, unwrapped phase display, and before/after comparison mode.
Launch tool →Frequency Masking Simulator
Explore psychoacoustic frequency masking with interactive two-tone input, critical band visualization, and simultaneous/temporal masking curve display.
Launch tool →Harmonic Distortion Estimator
Calculate THD and THD+N from harmonic levels. Real-time mic input mode, harmonic spectrum display, and comparison against Hi-Fi/broadcast/telecom standards.
Launch tool →Real-Time Harmonic Balance Analyzer
Analyze harmonic content of a live signal as a bar chart showing fundamental through Nth harmonic, odd/even ratio, and waveform shape estimation.
Launch tool →Frequency-to-Voltage Converter (FVC)
Design LM2907/LM331 frequency-to-voltage converter circuits. Calculate R/C component values, plot transfer function, and use tachometer/flow meter presets.
Launch tool →Phase-Frequency Detector (PFD)
Simulate PFD operation in PLL circuits with reference vs. feedback visualization, output pulse width display, charge pump current calculator, and loop filter design aid.
Launch tool →Frequency Counter
Precise frequency measurement from microphone input with large digit display, adjustable gate time, min/max/average tracking, and RPM conversion mode.
Launch tool →Tone Detector
Identify DTMF phone keypad tones, single-frequency test tones, and multi-tone signals with configurable detection threshold and tone duration measurement.
Launch tool →Discriminator
Interactive FM discriminator simulation with S-curve visualization, center frequency and deviation input, and comparison of Foster-Seeley vs. ratio detector types.
Launch tool →