others including Buster Harding and veteran arranger Jimmy Mundy also expanded the group's repertoire. Thelma Carpenter replaced Helen Humes as the new female vocalist, notably recording "I Didn't Know About You" for Columbia Records. But the many new arrangements led to a gradual change in the band's sound, distancing the group musically from its Kansas City roots. Rather than the music being built around the soloists with memorised head arrangements and riffs, the group's sound at this time became more focused on ensemble playing; closer to the East Coast big band sound. This can be attributed to the increasing reliance on arrangers to influence the band with their music. It suggested that Basie's ideal of a big band-sized group with the flexibility and spirit of his original Kansas City 8-piece was not to last. During the World War II years, some of the key members of the band left: the drummer Jo Jones and tenor saxophone player Lester Young were both conscripted in 1944, leading to the hiring of drummers such as Buddy Rich and extra tenor saxophonists, including Illinois Jacquet, Paul Gonsalves and Lucky Thompson. The musicologist Gunther Schuller has said that when Jo Jones left, he took some of the smooth, relaxed style of the band with him. Replacements such as Sonny Payne, drummed much louder and raised the dynamic of the band to a "harder, more clamorous brass sound." The ban on instrumental recordings of 1942-1944 adversely affected the finances of the Count Basie Orchestra, as it did for all big bands in the United States. Despite taking on soloists from the next generation such as Wardell Gray, Basie was forced to temporarily disband the group for a short period in 1948, before dispersing again for two years in 1950. For these two years, Basie led a reduced band of between 6 and 9 people, featuring performers such as Buddy Rich, Serge Chaloff and Buddy DeFranco. The 'Second Testament' Basie reformed the jazz orchestra in 1952 for a series of tours, not only in the United States, but also in Europe in 1954 and Japan in 1963. The band released new recordings, some featuring guest singers such as Joe Williams, Frank Sinatra, Ella Fitzgerald and Billy Eckstine. All relied on contributions from arrangers, some of whom are now synonymous with the Basie band: Neal Hefti, Quincy Jones and Sammy Nestico. Michael G. Nastos wrote of the recording