Music Fundamentals: Pitch and Rhythm

The musical staff is a set of five lines and four spaces on which notes are placed to indicate pitch. The treble clef (G clef) and bass clef (F clef) assign specific letter names (A through G) to lines and spaces, with ledger lines extending the range above or below the staff.

A major scale is a seven-note scale built by following the interval pattern Whole-Whole-Half-Whole-Whole-Whole-Half step from any starting pitch. This pattern produces the familiar do-re-mi sound and serves as the basis for key signatures and diatonic harmony.

The natural minor scale follows the pattern W-H-W-W-H-W-W. The harmonic minor raises the seventh degree by a half step to create a leading tone. The melodic minor raises both the sixth and seventh degrees when ascending, then reverts to natural minor when descending.

A key signature is the collection of sharps or flats at the beginning of a staff that indicates which notes are consistently altered. The circle of fifths is a visual diagram showing the relationships among the 12 tones, arranged so each adjacent key differs by one sharp or flat.

An interval is the distance between two pitches, described by its numeric size (second, third, fourth, etc.) and quality (major, minor, perfect, augmented, diminished). Intervals are measured in half steps and are the building blocks of both melody and harmony.

Rhythmic notation represents the duration of sounds and silences using note shapes and rest symbols. A whole note lasts four beats in common time, a half note two beats, a quarter note one beat, an eighth note half a beat, and a sixteenth note a quarter of a beat. Dots add half the value of the original note.

In simple meter, each beat divides naturally into two equal parts (duple subdivision). In compound meter, each beat divides into three equal parts (triple subdivision). The top number of a simple time signature shows beats per measure; in compound time, divide the top number by three to find the number of beats.

Enharmonic equivalents are notes that sound the same pitch but are spelled differently depending on the musical context. The choice of spelling depends on the key and harmonic function.

Musical texture describes how melodic and harmonic elements are combined. Monophonic texture has a single unaccompanied melody. Homophonic texture has a melody with chordal accompaniment. Polyphonic texture has two or more independent melodies sounding simultaneously. Heterophonic texture has simultaneous variations of a single melody.

Timbre (tone color) is the quality that distinguishes one sound source from another, even at the same pitch and volume. Instruments are classified into families: strings, woodwinds, brass, percussion, and keyboards, each with characteristic timbral qualities based on their sound production method.