Jo Ann Kelly

Indorock is a high‑energy, guitar‑driven style that emerged in the Netherlands in the late 1950s, created by Indo (Eurasian Indonesian) musicians who blended American rock ’n’ roll with Indonesian/Moluccan musical sensibilities and Hawaiian steel‑guitar traditions. It is characterized by virtuosic lead guitar (tremolo picking, rapid single‑note runs, whammy‑bar dives), strong backbeat drumming, walking or slapping electric bass, and frequent instrumental showcases. Repertoires often mix rocked‑up standards, original instrumentals, and romantic ballads, with occasional rhythmic or melodic inflections drawn from kroncong and Hawaiian styles. Onstage, Indorock was known for flamboyant showmanship—acrobatic guitar moves, dynamic volume swells, and tight ensemble precision—helping ignite the broader Dutch guitar band boom that preceded the British Invasion on the Continent.

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.

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.

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.

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.