Big Walter Horton w/ Carey Bell

Chicago blues is an electrified, urban form of the blues that took root on Chicago’s South and West Sides during the Great Migration. Built on the 12‑bar blues and I–IV–V harmony, it is marked by amplified guitar, amplified harmonica ("harp"), piano, bass, and drum kit, with a swinging shuffle feel and a strong backbeat. Riffs, call‑and‑response between voice and lead instruments, and terse, memorable hooks are central. Lyrically, Chicago blues pivots from rural imagery to city life—work, love, nightlife, tough luck, and resilience—delivered with grit, wit, and emotional directness. The sound is raw yet powerful, merging Delta roots with urban rhythm sections and studio production that foregrounds groove and bite.

Classic blues (often called "classic female blues") is the early, urban, theater-bred form of the blues that flourished primarily in the 1920s. It is characterized by powerful lead vocalists—frequently women—fronting small jazz ensembles or a piano accompanist, with arrangements that translated the blues idiom to vaudeville stages and recording studios. Musically it typically uses the 12‑bar blues form, AAB lyric stanzas, swung or shuffle rhythms in 4/4, and prominent use of blue notes (flattened 3rd, 5th, and 7th). The style sits at the crossroads of Southern blues traditions, ragtime and early jazz, and the songcraft and professionalism of vaudeville and Tin Pan Alley. Classic blues differs from country/delta blues by its more formal arrangements, band instrumentation, and theatrical delivery. It launched the commercial “race records” era with Mamie Smith’s 1920 hit "Crazy Blues," and set the template for later jazz and R&B vocal performance.

Blues is an African American musical tradition defined by expressive "blue notes," call-and-response phrasing, and a characteristic use of dominant-seventh harmony in cyclical song forms (most famously the 12‑bar blues). It is as much a feeling as a form, conveying sorrow, resilience, humor, and hard-won joy. Musically, blues commonly employs the I–IV–V progression, swung or shuffled rhythms, and the AAB lyric stanza. Melodies lean on the minor/major third ambiguity and the flattened fifth and seventh degrees. Core instruments include voice, guitar (acoustic or electric), harmonica, piano, bass, and drums, with slide guitar, bends, and vocal melismas as signature techniques. Over time the blues has diversified into regional and stylistic currents—Delta and Piedmont country blues, urban Chicago and Texas blues, West Coast jump and boogie-woogie—while profoundly shaping jazz, rhythm & blues, rock and roll, soul, funk, and much of modern popular music.