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<div>I think I-II-IV belongs to a family of 025-based pentatonic-triad progressions like the blues "axe-fall" (IV-bIII-I), the "Green Onions" riff (I-bIII-IV), and similar dominant-based versions (I-bVII-V and V-bVII-I).</div>
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<div><span id=""></span>On Sun, Aug 30, 2009 at 11:17 PM, Paul Steinbeck <span dir="ltr"><<a href="mailto:paul.steinbeck@gmail.com">paul.steinbeck@gmail.com</a>></span> wrote:<br>I don't see the family resemblance. The "025-based" progressions in songs like "Green Onions" and "Hoochie Coochie Man" move (rootwise) along the minor pentatonic scale of the home key, in an unambiguously bluesy [035] fashion. The three roots involved in the I-II-IV progression do not, and the pentatonic scale(s) they belong to point to other keys (IV and ii).</div>
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<div>Yeah, "Green Onions" wasn't a good example since it functions as a melodic riff rather than a harmonic progression. I'm thinking more along the lines of the chord progressions I-bIII-IV in The Beatles' "Back in the USSR" or (I)-bIII-IV-I in Steppenwolf's "Born to be Wild." These sound bluesier than I-II-IV because they use flat-side triads instead of sharp-side, but I don't think they're functionally very different. I also don't think that the tonic of a pentatonic scale is always so clear. All best,</div>
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<div>Nicole Biamonte</div>
<div>Assistant Professor of Music Theory</div>
<div>University of Iowa</div>
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