How Computers Hear Melody: Pitch, Timing, and Note Feedback

Episoden

1. 1

   Sound, MIDI, and a Melody You Can Grade

   Melody asks a sharper question than harmony or rhythm: did you play the right notes at the right times? Discover why a computer grades pitch in MIDI, where one step is always one semitone.

2. 2

   Finding Pitch Over Time – pYIN and Voiced Notes

   A waveform does not name a note. Meet pYIN: a pitch tracker that estimates a fundamental every few milliseconds, then decides when a real note is present.

3. 3

   From Frames to Notes – Segmentation and Alignment

   Pitch-per-frame is not a melody yet. Group frames into notes, then align them to the target so an extra or missed note is not graded as the wrong pitch.

4. 4

   Scoring Pitch and Timing – Thresholds with Musical Meaning

   Each aligned note gets pitch credit and timing credit with public thresholds. Combined, pitch carries 70 percent of the grade because the wrong note is a deeper mistake than a slightly off beat.

5. 5

   Feedback You Can Trust – Known Errors and Encouragement

   The last step is language: one specific line per note, conservative about the word wrong. A take with planted mistakes shows whether those verdicts can be trusted.