Extensions was released on October 31, 1979 and debuted on Billboard’s Top Pop Album charts on December 8, 1979. Extensions began what Alan recalls as “a new chapter for the group.” Artistically and commercially, their fourth studio album was one of several new levels: It was the first one with Cheryl Bentyne, who had replaced Laurel Massé. Cheryl proved to be the perfect complement to the group’s already dynamic style and performance. It was also the first album that contained hits in both the jazz and pop categories. “Twilight Zone/Twilight Tone” went to #30 and “Trickle, Trickle” went to #73 on the Billboard’s Hot 100 chart. Overall, the album peaked at #55 on the Billboard Top LP’s chart. “A very exciting time,” Janis remembers.
As the Manhattan Transfer went on, so did the legacy of the jazz vocal ensemble. In that regard, though the competition was scarce, this group did elevate the art form to a higher level without much compromise. This two-CD, 39-track compilation represents many of the high points of the group. If anything is missing, some of the vocalese influenced by Eddie Jefferson should have been included. Still most fans will recognize "Ray's Rockhouse," "Route 66," "Four Brothers," "Tuxedo Junction," "That Cat Is High," "(Sing) Joy Spring," and their immortal take of the Jon Hendricks lyric to "Birdland." Unless it is a complete collection, you'd be hard pressed to find a better grouping of the Manhattan Transfer's prime body of works.
On this continually interesting CD, the Manhattan Transfer revisits tunes from the swing era, in some cases re-creating (through vocalese) specific recordings. Benny Goodman's 1935 version of "King Porter Stomp," Bennie Moten's 1932 recording of "Moten's Swing," Glenn Miller's "I Know Why," Charlie Barnet's "Skyliner," and Fletcher Henderson's exciting arrangement of "Down South Camp Meetin'" are among the many highlights. The vocals are superb (particularly Janis Siegel and Cheryl Bentyne), although one wishes that the individual members had more of a chance to improvise within the style. The backup groups are different than one would expect, including the Western swing band Asleep at the Wheel, violinist Mark O'Connor (Stéphane Grappelli makes a special appearance on "Clouds"), and steel guitarist Buddy Emmons. Recommended.