Counter to the norms of the time, these meticulously scored big-band charts are light on extended improvisation—but intentionally so—as Fischer considered the relationship between composition and arrangement equally important. Maintaining thematic control as primary soloist, Fischer proves to be a concise, yet original interpreter, demonstrated by his adroit pianism on the impressionistic tone poem "Quiet Dawn." His kaleidoscopic Hammond organ work, revealed elsewhere on the record, is equally colorful.

Alternating with the leader for the spotlight is tenor saxophonist Jerry Coker... Together Fischer and Coker accentuate the date's prismatic colors and variegated moods, which are by turns charmingly old fashioned, like the breezy "Ornithardy," or subversively modern, such as the jaunty "Igor," dedicated to Stravinsky. As part of the same continuum that includes Gil Evans, Stan Kenton and Gary McFarland, Fischer reveals a distinctive and unique compositional style. Accessible and sophisticated, Extension is a welcome reissue that will entertain and engage curious listeners on multiple levels.〔