RUTHLESS KARAOKE

// vocal signal analysis system //
Work in Progress: Scoring is an early prototype. Pitch, tone, and similarity numbers are estimates, not a certified vocal analysis — expect inconsistency and don't take the exact figures too seriously yet.

Song Setup

Auto-download from YouTube isn't available. Use the "Download MP3" button on the acapella search result below to get the file yourself, then upload it here (mp3/wav/m4a) before recording.

Recording

Lyrics & Scores

Lyrics

Lyrics will appear here after search...

Performance Scores (2-sec intervals)

Grey — no singing in the acapella here Red — poor match Orange — decent match Green — essentially identical
95%+ is realistically only achievable comparing the original audio against itself — a real human performance rarely clears that.
Complete a recording to see scores

Scoring Validation

Record yourself singing the SAME section twice to test if the scoring is consistent and accurate.

How it works
  1. Click "Record Test 1" and sing a section (5-10 seconds) — this becomes the reference
  2. Click "Record Test 2" and sing the SAME section again
  3. Test 2 is scored against Test 1, second by second
  4. High scores throughout = scoring is consistent; a dip shows where the takes diverged

Test 1 — Reference

Test 2 — Comparison

Heads up: Automatic acapella download isn't available — YouTube blocks it from this server. Use the "Download MP3" button on the acapella search result to get the file yourself, then upload it before recording.