True Resonance - 432Hz audio retuner

Retune any web audio to 432Hz, 528Hz and Solfeggio healing frequencies in real time. Works on Spotify, YouTube, Apple Music and any website that plays audio. No downloads, no re-encoding, no uploads, just install, pick a frequency and hear the difference. Why 432Hz? Many listeners find music tuned to 432 Hz warmer, calmer and more relaxing than the standard 440 Hz concert pitch. True Resonance lets you explore 432Hz vs 440Hz, the Solfeggio scale (396, 417, 528, 639, 741, 852, 963 Hz) and any custom pitch you choose - live, in your browser, without touching the original files. Headline features: - Real-time pitch shifting - works directly on the audio stream, zero re-encoding, no upload, no waiting - One-tap healing frequency presets - 432 Hz, 528 Hz and the full Solfeggio scale. - Pitch and speed modes - shift pitch while keeping tempo, or adjust playback speed with pitch preserved - Works everywhere - Spotify, YouTube, YouTube Music, Apple Music and any web audio - Minimal clean UI - small popup, keyboard shortcuts, dark-mode friendly, light-mode friendly - Open source and private - AGPL-3.0 licensed, no ads, no tracking, no data collection, no account required How it works: True Resonance captures the audio already playing in your active tab using Chrome's tabCapture API, processes it through a real-time Web Audio pitch shifter running in an offscreen document, and plays it back retuned to the frequency you choose. No re-encoding, no upload, no waiting - the shift happens live as the music plays. Use cases: - 432Hz music listening - shift Spotify songs, YouTube playlists and Apple Music albums to 432 Hz on the fly - Solfeggio and healing frequencies - switch to 528 Hz, 396 Hz or any frequency in the scale for meditation, sound healing and mindfulness sessions - Meditation and mindfulness - shift ambient music to 432 Hz to support chakra alignment during meditation - Alternate tuning for musicians - preview how a track sounds at A=432 Hz vs A=440 Hz without downloading or re-tuning your instrument - 528Hz love frequency - listen to your favourite songs shifted to 528 Hz for relaxation and yoga - Study and focus background audio - shift lo-fi and ambient streams to 432 Hz while you work - Custom frequencies - dial in any Hz value up to 9999 Hz for sound therapy, tuning experiments and frequency research Frequently asked questions: Does this work on Spotify? Yes - True Resonance works on Spotify, YouTube and any website that plays audio in real time, with no upload and no re-encoding. Does retuning slow down my songs? Only in speed mode. In pitch mode the tempo is preserved - only the pitch changes. Is my music uploaded anywhere? No. All audio processing happens locally in your browser. Nothing is uploaded, no track data is collected, no account is required. Does it work on Spotify, YouTube and Apple Music at the same time? You pick the active tab - True Resonance processes whichever tab you have focused. Only one tab is active at a time. Is 432Hz scientifically proven to be healing? 432 Hz tuning is widely used in meditation, sound therapy and wellness communities. True Resonance lets you listen and decide for yourself - it makes no medical or scientific claims. Is it free? Yes, 100% free, open source under AGPL-3.0, no ads, no in-app purchases, no account, no tracking. Technical details: - Real-time Web Audio pitch shifting with the SoundTouch audio worklet and Web Audio API - Chrome Manifest V3, tabCapture + offscreen document architecture - No servers, no cloud, no upload - audio stays on your device - Open source on GitHub under AGPL-3.0 Perfect for anyone exploring 432 Hz music, alternate tuning, sound therapy, meditation audio, yoga soundtracks, mindfulness practice - or listeners who simply want their streaming music shifted to 432 Hz in real time. Install True Resonance, pick your frequency, and hear the difference.