Wave Shifter - Audio Effects Suite for Music & Video

Real-time browser audio processing with pitch shifting, EQ, reverb, dynamics, surround, speed control and more.

Wave Shifter is a free and open-source real-time audio processing suite for Chromium-based browsers. It lets you transform the sound of videos, music, live streams and other HTML5 media directly in your browser. Unlike simple playback speed extensions, Wave Shifter provides a complete set of real-time audio effects. Change pitch without affecting speed, enhance audio with professional effects, or build entirely new soundscapes using a flexible layer-based processing system. All audio processing happens locally on your device using the Web Audio API and AudioWorklets. Your audio never leaves your browser. ━━━━━━━━━━━━━━━━━━━━━━ 🎵 Pitch & Playback • Pitch shifting from -12 to +12 semitones • Fine pitch adjustment in cents • Playback speed control • Optional pitch preservation • Smart Processing mode • Adjustable processing block size ━━━━━━━━━━━━━━━━━━━━━━ 🎚 Audio Effects & Mastering • Volume Boost • Effects Mix (precise balance between original and processed sound) • 10-Band Equalizer with a built-in real-time frequency visualizer • Convolution Reverb with Ambience, Chamber, Hall, Plate and Space presets • Dynamic Range Compressor with Threshold, Knee, Ratio, Attack and Release controls • SRS WOW-Inspired Stereo Suite: Stereo Width (SRS 3D interpretation) Stereo Center control Stereo Focus • Left/Right Channel Balance • Bass Enhancement (Subbass generator & Warmth saturator) • Clarity / Definition Exciter ━━━━━━━━━━━━━━━━━━━━━━ 🎛 Creative Effects Create unique sound signatures by combining multiple real-time effects. 🎸 Lo-Fi Effects • Distortion • Bitcrusher • CD Skipper • Vinyl Simulator ⏱ Delay • Stereo Ping-Pong Delay • Adjustable Time • Feedback • Wet/Dry Mix 🎹 Modulation Effects • Chorus • Flanger • Phaser • Tremolo • Vibrato • Rotary Speaker • Ring Modulator • Vowel Filter • Auto Panner • Auto Filter Effects can be layered, chained and mixed to create everything from subtle enhancements to completely transformed audio. 🔄 Overlay Mode • Run multiple effect presets simultaneously on the same audio source • Independent volume control for each preset in the overlay chain ━━━━━━━━━━━━━━━━━━━━━━ 🎬 Surround • Experimental Dolby Surround (5.1) Upmix Expand stereo audio into a virtual surround sound field on supported systems. ━━━━━━━━━━━━━━━━━━━━━━ 🌐 Browser Integration • Works with HTML5 audio and video on virtually any website • Supports popular web audio libraries including Howler.js • Automatically detects dynamically created media elements • Automatically reconnects when websites replace media elements during playback • Configurable website blacklist with wildcard support ━━━━━━━━━━━━━━━━━━━━━━ ⚙ Intelligent Compatibility Wave Shifter automatically adapts to browser security restrictions. Whenever possible it uses the high-quality Signalsmith Stretch engine running through WebAssembly. If WebAssembly execution is blocked by a website's Content Security Policy (CSP), Wave Shifter automatically switches to a JavaScript-based processing engine, allowing audio processing to continue on websites where many similar extensions stop working. ━━━━━━━━━━━━━━━━━━━━━━ 🔒 Privacy • No accounts • No subscriptions • No analytics • No telemetry • No cloud processing All processing happens locally inside your browser. ━━━━━━━━━━━━━━━━━━━━━━ 🚀 Open Source Wave Shifter is completely free and open source. Bug reports, feature requests and pull requests are always welcome. Continuously tested and improved for compatibility with modern streaming platforms and web audio applications.