 Files can be identified by the file signature in the first four bytes, which will be the ASCII characters "CTMF" (Creative Technology Music File) if the file is in CMF format.The instruments inside a CMF file are stored in an identical manner to that used in SBI files (Sound Blaster Instrument), minus the SBI header.The music block is in standard MIDI format, allowing for easy conversion between .mid and .cmf files.