The effort encouraged people to use the stairs instead of the escalators by making each stair a functioning piano key, so that every step was music in the making.

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His low-key, piano-led music has won numerous fans, including Lily Allen, who originally signed him to her record label, In The Name Of, earlier this year.

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The application process for artists, from professionals to emerging to students, is currently under way to paint the 88 pianos (the number stands for each key on the piano).

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" McDermott banged a schoolhouse Everett spinet piano (with a recently revived low A key) into submission in another Morton classic, "Grandpa's Spells.

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About one second into "Serpentine, " it's clear that Chris Bathgate knows his way around pretty, minor-key indie-folk: The mournful piano line which opens the song makes that instantaneously clear.

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After all, the piano is such a welter of machinery: Push a key and before you hear a note, a small lever pushes against an intermediate lever, which pushes a jack, which pushes a roller, which pushes a hammer toward the strings.

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With the Beyeler Foundation, Mr Piano saw the need for restraint, for something in a gentler key, and deliberately avoided a self-expressive, ego-driven creation that would intrude upon the works of art.

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Ms. McAlister recommends that beginners opt for a full-size 88-key model that has a "weighted action, " which simulates the feel of actual piano hammers.

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The piano interlude captures the sweet side of the one-eyed pianist's syncopated style, set in a minor key but with a rolling, rollicking New Orleans bass that demonstrates how men like Booker used their music to drive the blues away.

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