The album commences with two jazz standards, including Gershwin's aria "My Man's Gone Now," which Evans had notably recorded live during his famous 1961 Village Vanguard sessions. After that, the material is contemporary, with compositions by Claus Ogerman and Joe Zawinul as well as originals by both participants, including Evans's "Turn Out the Stars," which the pianist had previously recorded as part of a solo elegy for his father on Bill Evans at Town Hall.
Evans recalled, "I loved working with Jim Hall. The wonderful thing about him is that he is like a whole rhythm section." Likewise, Hall said, "He was so easy to work with. It was just like he read your mind all the time."[2]
Writing for AllMusic, music critic Michael G. Nastos notes of the album: "A duet recording between pianist Bill Evans and guitarist Jim Hall is one that should retain high expectations to match melodic and harmonic intimacies with brilliant spontaneous musicianship. Where this recording delivers that supposition is in the details and intricacy with which Evans and Hall work, guided by simple framings of standard songs made into personal statements that include no small amounts of innovation. ... At only 32 and a half minutes, it's disappointing there are no bonus tracks and/or additional material for a CD-length reissue, but Intermodulation still remains a precious set of music from these two great modern jazz musicians."[3]
Evans's biographer Peter Pettinger notes that "the textural and creative amalgam of their earlier Undercurrent was perpetuated, the complementary interweaving of solo and supporting roles again done to perfection." He also homed in on a key track: "Evans's new masterpiece, 'Turn Out the Stars,' revealed its constructional qualities more readily in this more formal studio presentation [than on the live Bill Evans at Town Hall], although it was no less lyrical for that. Its long-spun line makes a satisfying arch of melody .... The delight for the listener throughout the record is the privilege of sitting in on two supreme artists playing for pleasure."[6]
