"[2][4][5] Reforming in March 1970 as Frumpy (a play on Rumpf's surname inspired by seeing the word "frumpy" in a CBS record catalogue) the new line-up of Rumpf, Bohn, Kravetz and Schott debuted at the Essen International Pop & Blues Festival in April 1970, where two of their songs "Duty" and "Floating" were recorded and released on the live compilation album Pop & Blues Festival '70.
[6] Initially the band played without a guitarist, which was unusual in the rock genre, instead making great use of Kravetz's "spacey organ excursions" and his powerful Leslie Rotating Speaker System, a sound modification and frequency modulation device.
The album, "heavier and more mature progressive rock with classical overtones in Kravetz's organ ([and] occasionally mellotron) work," repeated the success of the first, and gave the band a hit single with "How the Gipsy Was Born", which would become their "signature tune.
[3][4] Baumann expressed a desire to establish a solo career also, and the band played a "farewell concert" on 26 June 1972 with Thomas (Carola) Kretschmer [de] on guitar.
Shortly after Frumpy disbanded, Rumpf, Kravetz and Schott recruited guitarist Frank Diez and drummer Curt Cress, both formerly with Munich-based jazz fusion combo Emergency, to form a "supergroup" called Atlantis [de].
[3] They then released It's Getting Better (1973), which had a strong Afrobeat influence, and caused Die Zeit to hail Rumpf as a "superstar", after which in early 1974 Kravetz left the band to join Randy Pie.
The third album Ooh Baby (1974) was written mostly by Askew and Conti and veered towards the P-funk sound, and the band toured the U.S. as a support act for Aerosmith and Lynyrd Skynyrd.