PrepSound

PrepSound is a suite of professional audio tools that runs entirely in your web browser. It's for audio engineers testing equipment, musicians tuning instruments, and anyone who needs a precise audio signal generator. No installation is required.

The entire toolset is built on the Web Audio API. This means all sound generation and processing happens directly on your device, not on a server. Nothing is ever uploaded, and you don't need an account. It's private and completely free. You can generate a signal and download it as a lossless WAV file instantly.

PrepSound offers a range of tools for different tasks.

• Signal Generation: Create precise tones with oscillators, generate frequency sweeps, and produce various types of noise like pink or white noise.
• Audio Testing: Test speakers and subwoofers, check your hearing thresholds, and use calibration tools to tune a room's acoustics.
• Voice & Modulation: Record your voice, shift pitch, stretch time, and experiment with speech synthesis.
• Acoustic Tools: Explore binaural beats for brainwave entrainment or work with alternative tuning systems.

The tools are designed for professional use. Oscillators have sample-accurate precision, and gain adjustments are click-free. The frequency controls use a logarithmic scale that matches how people actually perceive pitch, making them intuitive to use across the full audible spectrum.