A pitch detector that teaches

See the note. Understand the music.

Find the Note listens through your microphone, identifies the pitch, and places it on the musical staff. Then its free lessons show you what that information means.

Open the pitch detectorLearn music in 30 minutes

Free to use·No accounts·Nothing to install

Two clear ways to learn

Take the quick tour or learn the whole system.

These are complete learner-facing lessons with explanations, examples, practice, and answers. Teacher companions are included separately.

Start here · 30 minutes

Music Theory in 30 Minutes

Use the detector, understand pitch and note names, read the staff, meet sharps and flats, and make sense of transposing instruments.

One complete lessonAbsolute beginnerInteractiveStart the quick lesson → Go deep · 60 lessons

Full Music Theory Course

Progress from listening and rhythm through notation, keys, harmony, form, tuning, transposition, ear training, and composition.

8 chaptersMade for self-teachingSchool compatibleExplore the full course →
Teaching high school? Open the teacher resources →
Also available on iPhone & Android

Take Find the Note to the music stand.

The mobile app works offline with the same instruments, clefs, and visual pitch feedback.

Download on the App StoreGet it on Google Play
Immediate visual feedback

Let yourself see what you are hearing.

Play or sing a note and watch it land on the staff. Use the measurement as evidence while your ears remain in charge.

  • Shows the note on the staff as you play
  • Displays note name, frequency, and tuning in cents
  • Supports band and orchestra instruments with correct clefs and transpositions
  • Includes a dual-staff mode for comparing written and concert pitch
Open the detectorLearn how it works

Works best on a laptop or desktop with a microphone.