SHI

SHI files are "Shroom Instruments" used by ShroomTool, which extracts / injects Mario Paint music data (in SHO format) from ZSNES v1.43 ZST save states.

Links

 * ShroomTool at Battle of the Bits.
 * ShroomTool download (includes source)
 * ShroomPlayer download (plays back SHO files)
 * Mario Paint format info at Battle of the Bits
 * ZSNES