A great course doesn't just ask you to identify a minor third. It asks you to sing it. Ear training and solfege are two sides of the same coin. The PDF should include "call-and-response" exercises where you sing back written patterns.
A static PDF plus audio links is powerful, but you can supercharge it with free apps: A great course doesn't just ask you to
A comprehensive curriculum is typically structured across sequential tiers to ensure steady progress: Core Music Theory Solfege & Ear Training Focus Rhythm Dictation Concepts Major scales, key signatures Major scale steps, perfect intervals Quarter, eighth notes, 2. Intermediate Minor scales, triads Minor intervals, major/minor triads Sixteenth notes, triplets, 3. Advanced Seventh chords, inversions Chromatic solfege, chord inversions Syncopation, ties, compound meters 4. Mastery Secondary dominants, modulation Non-diatonic alterations, modulations Mixed meters, polyrhythms, tuplets Advanced Seventh chords
Mastering both simple and compound time signatures. 4. Music Theory: The "Why" Behind the Sound inversions Chromatic solfege
Learning how stacking thirds builds major, minor, diminished, and augmented triads.
Ear training turns abstract sounds into recognizable patterns. Solfège (Do, Re, Mi) is the primary tool for this.