Rusty Waveform & FFT Visualizer

A real-time waveform generator and FFT spectrum analyzer written in Rust.

The application allows users to generate mathematical waveforms from equations, add configurable noise, and visualize both the signal and its frequency spectrum in real time.

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Screenshot

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Features

• Real-time waveform generation
• Fast Fourier Transform (FFT) visualization
• Mathematical expression parser
• Adjustable noise floor
• Configurable sampling rate
• Configurable record length
• Linear and Log10 FFT display
• Scatter or Line plotting
• CSV import/export support
• Puffin performance profiling

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Building

Clone the repository

git clone https://github.com/<your-name>/rusty-waveform.git
cd rusty-waveform

Run

cargo run --release

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Controls

Waveform

Enter any mathematical expression using t as the time variable.

Example expressions:

sin(2*pi*100*t)

0.5*sin(2*pi*50*t)

sin(2*pi*10*t)+0.5*sin(2*pi*100*t)

exp(-t)*sin(2*pi*20*t)

abs(sin(2*pi*5*t))

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FFT

The application computes a Fast Fourier Transform (FFT) of the generated waveform using the excellent rustfft crate.

Current features:

• Half-spectrum display
• Optional logarithmic scaling
• Automatic amplitude normalization

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Performance

The application includes Puffin instrumentation for profiling.

Launch Puffin Viewer and connect to the application to inspect:

• UI rendering
• FFT processing
• Plot rendering
• Waveform generation

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Future versions will separate these into individual modules.

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Roadmap

• Multiple waveforms
• Cached FFT plans
• Cached expression compilation
• Windowing functions
• Spectrogram
• FFT averaging
• Peak detection
• Zoom & pan improvements
• Export FFT data
• Custom color themes
• Performance optimizations

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