On the SPD-SX PRO, the PAD EDIT [1] and [2] knobs are disabled when their LEDs are unlit. To enable the knobs, press the [SELECT] button and select the parameters to control.
| [1] knob | [2] knob | |
| Unlit | Off | Off |
| Top row lights | Layer Volume | Layer Pitch Coarse |
| Bottom row lights | Transient Attack | Transient Release |
| Both rows light | Assign | Assign |