instrument.games

About Accidental Mastery

Blend all accidentals with ledger work for fluency.

Part of Sight Reader on instrument.games. It runs in the browser, scores every run, and needs no account to play.

How to approach it

  • Visualize the keyboard layout as you read.
  • Look for patterns in accidentals to stay ahead.
  • Accuracy keeps your streak alive – breathe and reset quickly.

What the 3 rounds cover

Accidental Blending

Rapid shifts between sharps, flats, and naturals.

25 notes, from C4 to B♭4

All Ledger

Focus on ledger notes both above and below.

45 notes, from F3 to C6

Challenge Mix

Blended accidentals with quick recognition needed.

25 notes, from C4 to B♭4

More Sight Reader levels

Treble Staff Basics

Spaces, lines, then both together to build reading confidence.

Mallet Octave Explorer

Master a full run of natural notes — one bar per letter, F to E.

Two Octave Naturals

Expand up and down the staff without ledger lines just yet.

Ledger Line Intro

Add the low C and prepare for presets and MusicXML patterns.

Flat Notes Focus

Introduce flats and alternative spellings across the staff.

Full Staff with Flats

Mix naturals and flats across treble with fluid motion.

Sharp Accents

Sharps join the game – ledger lines and speed increase.

Advanced Ledger Reading

Mix wide ledger lines with both sharps and flats.

Level by Josh Stovall · Published November 22, 2025