Musical Instrument Digital Interface is the default interface to connect any digital musical instrument to a sound card. This allows data to be transferred across the sound card and the device, and allows recording of any composition to the system. Each MIDI port can connect to up to 16 compatible devices simultaneously, enabling a single PC to control these devices. MIDI uses a standard set of codes that conveys information about how to produce the sound—rather than the sound itself— so MIDI files are small compared to the audio file for the same content. Since a MIDI file relies on the sound card’s wavetable to create an output, the results may vary with the sound card. The 15 pin D-sub MIDI interface also doubles as a gameport to plug in compatible gamepads.