 By the time of Windows 3.0's 1990 release, PCs had caught up in processing power and had acquired a graphical interface and software titles began to see release on multiple platforms.The Standard MIDI File (SMF) is a file format that provides a standardized way for music sequences to be saved, transported, and opened in other systems.The standard was developed and is maintained by the MMA, and usually uses a codice_1 extension.