SMUS is an IFF based tracker module music format. Unlike most tracker modules, the instruments are not contained within the file. Instead players look for individual instrument files in the parent directory in a folder called 'Instruments'. Instruments are usually a pair of files, meta data in a
InstrumentName.instr file and actual sampled audio in
Files begin with
'F' 'O' 'R' 'M' ?? ?? ?? ?? 'S' 'M' 'U' 'S'.