From amigadepacker manual:

       amigadepacker depacks compressed Amiga formats, which are: PowerPacker,
       XPK SQSH, MMCMP and StoneCracker 4.04 (S404).  Amigadepacker will auto-
       matically  determine  the  compressed  format  by content.  Among other
       things, the tool is useful for playing packed Amiga music formats  with
       uade (1).