Assertion: pop music's form | /r/HasProperty | introduced into jazz
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text: New forms of chromaticism and dissonance were introduced into jazz, and the dissonant tritone (or "flatted fifth") interval became the "most important interval of bebop" Chord progressions for bebop tunes were often taken directly from popular swing-era songs and reused with a new and more complex melody and/or reharmonized with more complex chord progressions to form new compositions, a practice which was already well-established in earlier jazz, but came to be central to the bebop style.