音源规格，是针对音源所制订的规范，以General MIDI为最为普遍。其他常见的规格还包括：乐兰公司制订的Roland GS和山叶株式会社推行的Yamaha XG。

• 音源
• 合成器
• MIDI

A sound module is an electronic musical instrument without a human-playable interface such as a keyboard. Sound modules have to be operated using an externally connected device, which is often a MIDI controller, of which the most common type is the musical keyboard (although wind controllers and guitar controllers are also used). Controllers are devices that provides the human-playable interface and may or may not produce sounds of its own. Another common way of controlling a sound module is through a sequencer, which is computer hardware or software designed to record and play back control information for sound generating hardware. Connections between sound modules, controllers, and sequencers are generally made with MIDI (Musical Instrument Digital Interface), which is a standardized protocol designed for this purpose.