Charlie Rouse opens his 1960 album Yeah! with a warmly expressive reading of Gene de Paul's ballad "You Don't Know What Love Is," a tune that had become a touchstone for jazz musicians since its 1941 debut. Rouse delivers two tender tenor saxophone choruses through the 32-bar AABA form in D minor, his playing marked by the dry, slightly nasal tone and deliberate phrasing that became his unmistakable signature during his long tenure with Thelonious Monk. His approach to the ballad is patient and melodically focused, each phrase carefully shaped and placed with rhythmic subtlety. Billy Gardner follows with one and a half piano choruses that complement Rouse's understated approach, his playing supportive and harmonically attentive. The quartet format, with Peck Morrison on bass and Dave Bailey on drums, provides an intimate setting that suits the material perfectly. Yeah! was recorded during the period when Rouse was establishing himself as Monk's permanent tenor saxophonist, a role he would fill for over a decade. The album gave Rouse a rare opportunity to step out as a leader and demonstrate the full range of his musical personality beyond the Monk context, and this opening ballad reveals a lyrical sensitivity that his work with the pianist's angular compositions sometimes masked.