Number: 12 (coarse) 44 (fine)
This can control any parameter relating to an effects device, such as the Reverb Decay Time for a reverb unit built into a GM sound module.
Note: There are separate controllers for setting the Levels (ie, volumes) of Reverb, Chorus, Phase Shift, and other effects. This controller would be used for some effects parameter for which there is not already another defined controller.
If a MultiTimbral device, then each Part usually has its own Effect Control 1.
14-bit coarse/fine resolution. 0x0000 to 0x3FFF where 0 is minimum effect.