Blind Willie McTell

Delta blues is a raw, emotionally direct style of country blues that emerged in the Mississippi Delta—an alluvial plain stretching from Memphis to Vicksburg. It is typically performed by a solo singer accompanying themselves on acoustic guitar, often with bottleneck slide. Hallmarks include expressive, speech-like vocals; flexible, rubato timing; insistent thumb-driven bass patterns; syncopated treble figures; and frequent use of open tunings. Lyrics are vivid and personal, touching on hardship, migration, love, work, spirituality, and folklore. Though commonly framed by 12‑bar and 8‑bar blues forms, Delta blues thrives on elastic phrasing, blue notes, and call-and-response between voice and guitar. Its sound is earthy, gritty, and intimate—music for porches, juke joints, and field gatherings—yet it became one of the most influential sources for electric urban blues and rock.

Pre-war blues refers to the acoustic, largely rural and early urban blues recorded and performed in the United States before World War II, roughly from the early 1920s through the late 1930s. It encompasses several regional styles—most notably Delta (Mississippi), Piedmont (Southeast), Texas, Memphis, and St. Louis blues—as well as the "classic" female blues of the vaudeville and theater circuits, which featured powerful vocalists accompanied by small jazz ensembles. Hallmarks include expressive, melismatic singing, bent or "blue" notes, call-and-response between voice and instrument, slide guitar, ragtime-derived fingerpicking, and strophic verses often in an AAB lyrical pattern over 12-bar or related blues forms. Lyrically, pre-war blues chronicles everyday life—work, migration, love, faith, injustice, and resilience—with a vivid mixture of poetry, metaphor, and lived detail. The sound world is intimate and direct, shaped by solo or small-ensemble performances captured to 78 rpm discs, and it provided the foundational vocabulary for later blues, R&B, rock and roll, and much of American popular music.

Country blues—also called rural blues or folk blues—is the earliest widely documented form of the blues, rooted in the everyday music-making of African Americans in the rural American South. It typically features a solo singer accompanying themselves on acoustic guitar, with flexible time, expressive vocal delivery, and abundant use of blue notes. While 12‑bar structures are common, country blues often stretches or compresses measures to fit the lyric, making phrasing elastic and conversational. Regional flavors emerged—Delta (driving, droning thumb bass and slide), Piedmont (ragtime‑inflected fingerpicking), and Texas (looser phrasing and single‑string leads)—but all share storytelling lyrics about work, travel, love, hardship, and spiritual longing.

Acoustic blues is a family of blues styles performed on non-amplified instruments, most commonly solo voice with acoustic guitar and, at times, harmonica. It emphasizes raw, intimate timbres; elastic vocal phrasing; and guitar techniques such as fingerpicking, alternating-bass patterns, and bottleneck slide. Rooted in African American folk traditions of the U.S. South, acoustic blues typically favors small-scale, conversational performance practice—call-and-response between voice and guitar, expressive "blue notes," and lyrics in the AAB stanza form. Substyles include Delta blues (driving, slide-heavy), Piedmont blues (ragtime-influenced fingerpicking), and Texas blues (looser, narrative-driven playing).

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.

Piedmont blues is an East Coast style of acoustic blues defined first and foremost by its guitar technique. Players use a steady, alternating-thumb bass on the lower strings while the index (and sometimes middle) finger picks syncopated melodies on the treble strings. The resulting texture imitates ragtime or stride piano: a walking/oom‑pah bass underpinning a dancing, off‑beat melody on top. Developed in the southern Appalachian foothills and the broader U.S. East Coast, the style favors clear, song‑like melodies, buoyant rhythms, and a repertoire that ranges from blues and hokum to gospel and dance tunes. Blues researcher Peter B. Lowry coined the term “Piedmont blues,” sharing credit with folklorist Bruce Bastin, to distinguish this ragtime‑based, melodically oriented approach from the more riff‑driven, modal feel of Mississippi Delta blues.