Sarah Vaughan

Vocal jazz is a jazz tradition in which the human voice is treated as an instrument—matching the phrasing, articulation, and timbral nuance of horns or piano. Singers often improvise melodically and rhythmically, including using scat singing (nonsense syllables) to emulate instrumental solos. At the same time, many vocal‑jazz performances favor traditional, pop‑leaning song structures and clear lyric delivery, reducing the overall role of extended improvisation compared with small‑group instrumental jazz. Repertoires frequently draw from Tin Pan Alley and Broadway standards (the Great American Songbook), rendered with swing, ballad, or Latin feels.

Standards refers to the shared core repertoire of widely known songs in American popular music, especially those from the Great American Songbook. These pieces became "standards" because they have been performed, recorded, and reinterpreted across decades by countless singers and jazz instrumentalists. Typically originating from Tin Pan Alley, Broadway, and Hollywood films of the early–mid 20th century, standards are marked by memorable melodies, refined lyric craft, and harmonically rich progressions that invite interpretation and improvisation. Many use 32‑bar song forms (AABA or ABAC), employ circle‑of‑fifths motion, secondary dominants, and occasional key changes, and work equally well as ballads or swinging uptempo pieces. Today, standards function as a common language for jazz and traditional pop musicians, anchoring jam sessions, vocal recitals, and crossover projects while continuing to inspire new arrangements and recordings.

Jazz is an improvisation-centered music tradition that emerged from African American communities in the early 20th century. It blends blues feeling, ragtime syncopation, European harmonic practice, and brass band instrumentation into a flexible, conversational art. Defining features include swing rhythm (a triplet-based pulse), call-and-response phrasing, blue notes, and extended harmonies built on 7ths, 9ths, 11ths, and 13ths. Jazz is as much a way of making music—spontaneous interaction, variation, and personal sound—as it is a set of forms and tunes. Across its history, jazz has continually hybridized, from New Orleans ensembles and big-band swing to bebop, cool and hard bop, modal and free jazz, fusion, and contemporary cross-genre experiments. Its influence permeates global popular and art music.

Tin Pan Alley refers to the late‑19th- and early‑20th‑century New York music‑publishing hub that industrialized the creation and promotion of American popular song. Centered around West 28th Street in Manhattan, publishers and song pluggers churned out catchy tunes for mass sheet‑music sales and vaudeville performance. Musically, Tin Pan Alley songs favored memorable melodies, clear hooks, and singable ranges, often set in 3/4 waltz time or 4/4 with light syncopation picked up from ragtime. The prevailing 32‑bar AABA form became a defining template, with diatonic harmony enriched by secondary dominants, circle‑of‑fifths motion, and occasional modulations. Culturally, Tin Pan Alley fed Broadway revues, vaudeville circuits, and later radio and film, laying the foundation of the Great American Songbook. Its output ranges from romantic ballads to novelty numbers and uptempo dance songs, shaping the language of American popular music for decades.