Sound modules can be thought of being the "guts" of a synthesizer, digital piano or organ without the keyboard being attached. This means that the module can be controlled by an external device, such as a sequencer. These modules are space saving and often more affordable than if they came with the keyboard attached. Couple a sound module with one of our MIDI controllers and you're good to go. We also have Virtual Sound Modules which are purely software-based. Whatever you choose to go with, Musician's Friend guarantees you the lowest price around so you can shop for your sound modules in total confidence.