The man responsible for lending BioShock and BioShock 2 their respective aural atmospheres will be returning to the orchestra pit for BioShock Infinite, creative director Ken Levine revealed during his Reddit AMA.
"We're proud to announce that Garry Schyman, composer of BioShock 1 and 2 has returned to the composer's chair for BioShock Infinite," Levine said in the comments. "His score is very different from the first two games, yet very much guided by the same aesthetic principles. We were lucky to have him and I can't wait until you get to hear some of his stuff. He's working in a different, sparer style, but it's awesome."
Aside from the BioShock series, Schyman's resume also includes work on XCOM
Update: This post originally listed XCOM: Enemy Unknown among Schyman's previous work, which is incorrect. In actuality, Schyman has worked on Take-Two's completely different XCOM.