Incognito is one of the more curious Frank Zappa bootlegs, because it lacks any additional information other than the locations of the two concerts excerpted. "Call Any Vegetable" is the one track supposedly from a 1971 concert at Fillmore West, though singers Flo & Eddie (Howard Kaylan and Mark Volman, previously with the Turtles) are definitely present. It is very similar to the version heard on Zappa's commercial release Just Another Band From L.A.; it may be from a soundboard tape, but it doesn't compare in sound quality to its legitimate cousin, although it is a good bit longer. The quality of sound drops even more drastically during the 1969 vintage music, purportedly recorded at the Royal Albert Hall in London. Following a percussion solo, Ian Underwood's flute is heard seguing into "Some Ballet Music" (as Zappa referred to it on the live bootleg recorded at the Ark the previous year), which was later incorporated into Zappa's amusing late-'70s magnum opus about the creation of the calendar, "The Adventures of Greggery Peccary." Next is some untitled experimental music, as Zappa was prone to include during concerts within this period of his career, and finally, a rather average version of "Big Leg Emma." None of the instrumental solos are particularly remarkable, so the music within this release hardly qualifies as landmark material from Zappa's long and extremely productive career. Only the most dedicated fan will bother to look for this out of print bootleg LP.
AllMusic Review by Ken Dryden