gen-briefly-explain-intervals-and-their-quality-and-one-common-m-dcad

Briefly explain intervals and their quality and one common misconception about it.

# Musical Intervals ## What Are Intervals? An **interval** is the distance between two pitches. Intervals are measured by: 1. **Number** (2nd, 3rd, 4th, etc.) - counting letter names inclusively 2. **Quality** (major, minor, perfect, augmented, diminished) - the exact half-step distance ## Quality Types - **Perfect (P)**: unison, 4th, 5th, octave - **Major (M) / Minor (m)**: 2nd, 3rd, 6th, 7th - **Augmented (A)**: one half-step larger than major/perfect - **Diminished (d)**: one half-step smaller than minor/perfect ## Common Misconception **"A 3rd is always 4 half-steps"** ❌ Many beginners think intervals of the same number are always the same size. In reality: - **Major 3rd** = 4 half-steps (C to E) - **Minor 3rd** = 3 half-steps (C to E♭) The interval number tells you which letter names are involved, but the *quality* determines the exact distance. Both are thirds because they span three letter names (C-D-E), but they're different sizes.