Yes. The SESSION function of BTS for KATANA-AIR (Ver. 2.0.0 or later) supports the following audio formats.
Tap [+] in the upper left corner of the SESSION screen, and select “MUSIC LIBRARY”, then tap “NEXT” to select the file you want to play.
NOTE: With the combination of KATANA-AIR System Program Ver. 1.30 or earlier and BTS for KATANA-AIR Ver. 2.0.0, some restrictions exist on connections and functions. To use the functions added to BTS for KATANA-AIR Ver. 2.0.0 with KATANA-AIR, please update the system program to Ver. 2.00 or later.
For details on the limited functions, see "BOSS TONE STUDIO LIMITATIONS WITH KATANA-AIR VERSION 1.30".