Guitar Ear Training

Auto-advance: Move to a new chord after a correct note.

Adaptive difficulty: Prioritize weaker interval and major/minor categories from recent results.

Cents tolerance: How close to in-tune the note must be.

Clarity threshold: Minimum confidence before a note counts.

Tonic pad: Shape sustain, fade-in, tail, and brightness of the tonic sound.

Modal keys: Switch tonic drills from major/minor into modal centers.

Non-diatonic chords: Inject borrowed chords to make tonic context less predictable.

Jazz harmony: Use seventh-chord progressions in tonic and play-in-key drills.

Pitch callback monitor: Tracks rolling callback interval timing (not full audio round-trip latency).