Unknown

Tracking since Apr 21, 2026.

Changelog

• Jun 3, 2026
  description

  Transpose any YouTube video into your key. Slow it down to learn a solo. Loop four bars until they click. Tonika is a musician's toolbox for YouTube — pitch shift, speed control, and A-B loops, all running locally in your browser.
  
  ━━━ FEATURES ━━━
  
  - Pitch shift ±12 semitones — transpose any video to any key
  - Fine tune ±100 cents — handle off-pitch recordings, alternate tunings, A=432 Hz reference
  - Speed 25% to 400% — slow down to transcribe, speed up to skim
  - Decoupled pitch and speed — change tempo without the chipmunk effect (powered by SignalSmith Stretch phase-vocoder WASM)
  - A-B loop with named regions — set precise markers, name your loops, practice sections on repeat
  - Per-song memory — come back to a video and Tonika restores your last pitch, speed, and loop automatically
  - Keyboard shortcuts — Alt + Shift + arrows for hands-on-instrument control
  - Recent songs list — jump back to anything you adjusted in the last 50 videos
  - Light and dark theme — follows your system or pick manually
  - Works on youtube.com and youtube-nocookie.com (embedded players)
  
  ━━━ WHO IT'S FOR ━━━
  
  - Singers matching a song to your vocal range
  - Guitarists practicing with backing tracks in drop D, half-step down, or any tuning
  - Piano students slowing down a Chopin interpretation to learn the left hand
  - Drummers looping a fill to nail the sticking
  - Jazz musicians transcribing solos at half speed without the pitch dropping an octave
  - Teachers making YouTube lessons accessible at slower tempos
  - Producers referencing songs at different tempos without re-encoding
  
  ━━━ HOW IT WORKS ━━━
  
  Click the Tonika icon while a YouTube video is playing. Drag the Transpose slider to change key. Drag Speed to slow it down. Flip on A-B Loop to practice a section on repeat. Everything responds live — no re-buffering, no re-encoding, no uploads.
  
  Tonika uses the Web Audio API + SignalSmith Stretch (an open-source, MIT-licensed phase-vocoder compiled to WebAssembly) to shift pitch without affecting speed and vice versa. The video stays frame-synced with the audio at all times.
  
  ━━━ KEYBOARD SHORTCUTS ━━━
  
  Default shortcuts (customize in chrome://extensions/shortcuts):
  
  - Alt + Shift + Up / Down — pitch up / down 1 semitone
  - Alt + Shift + Right / Left — speed up / down 5%
  - A-B loop toggle — assign your own key
  
  ━━━ PRIVACY ━━━
  
  Tonika runs entirely in your browser. No account, no sign-in, no analytics, no tracking, no telemetry, no network calls to any Sopivasti server. All audio processing happens locally in the tab. Your preferences and recent-songs history are stored in Chrome's built-in sync storage (syncs between devices signed into the same Chrome profile — never sent to us).
  
  Full privacy policy: https://sopivasti.com/privacy
  
  ━━━ WHAT'S NOT SUPPORTED ━━━
  
  - Spotify Web Player — streams encrypted audio via Widevine EME with no DOM media element, so browser extensions cannot attach to its audio graph
  - Apple Music Web, Deezer, Tidal — same architecture, same limitation
  - SoundCloud, Bandcamp, Vimeo — planned for v0.2, based on request volume

  (empty)

• Jun 3, 2026
  short_description

  Every song in your key. Pitch shift ±12 semitones, speed 25–400%, A-B loops. YouTube support.

  (empty)

• Jun 3, 2026
  name

  Tonika — YouTube Pitch Shift, Speed & A-B Loop

  Unknown

• Jun 3, 2026
  category

  productivity/tools

  (empty)

• Jun 3, 2026
  host_permissions

  (empty)

  (empty)

• Jun 3, 2026
  permissions

  storage, activeTab

  (empty)

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