Browser extension that transforms YouTube, Spotify Web and Apple Music into immersive 8D spatial sound
Play any sound backwards online for free
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: Full 8D experience with 8D rotation, Auto DJ, 8 presets, bass/clarity/reverb controls, floating panel with visualizer, 30-second shareable video samples, and 60-second previews of every Pro mode. Pro: $4.99 one-time payment unlocks multi-band surround, HRTF 3D, binaural beats, full-length expo
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Key features
8D rotation engine with circular, sine, triangle and bounce patterns
Beat-aware Auto DJ transitions carrying 4-8 beats between tracks
Multi-band surround with frequency-dependent positioning
HRTF 3D positioning with Orbit, Figure-8 and Drift paths
Binaural beats at 15 Hz, 10 Hz, 6 Hz and 3 Hz frequencies
Real-time audio visualizer with 120x120 canvas
30-second shareable video exports with visualizer
Full-length exports up to 10 minutes as MP4, WAV or M4A
Interaural time delay and head shadow filtering
Upload audio files to reverse
Extract and reverse audio from video files
Record audio directly in browser
Compare original and reversed audio
Download as MP3 or WAV file
Reverse singing mode
No account required
Process files on device only
Support for MP4, MOV, WebM video formats
MP3 compression option or WAV lossless format
What makes it different
Processes all audio entirely in browser with zero data sent anywhere, ever
Works directly on YouTube, Spotify Web and Apple Music without disrupting playback
Bio-accurate interaural delay of 0.7ms with HRTF 3D positioning
Instant license key delivery via email with immediate activation
No sign-up or account needed to use
Reverse singing mode lets you record your attempt and hear it flipped back
Compare original and reversed side-by-side with dual players
Extract audio from short videos without reversing or exporting the video itself
8Dfy
Reverse Audio