Roland SP-404MKII Creative Sampler and Effector - Manual (Page 38)

Sampling (SAMPLING)
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4. Use the [VALUE] knob to move the cursor to the parameter that you want to edit.
5. Use the [CTRL 1]–[CTRL 3] knobs to adjust the parameters.
For details on the various effect parameters, refer to “ MFX List (P.129)”.
Some effect parameters may be shared in common, depending on the bus to which the effect is assigned. For details, see “ How
the effect parameters are saved and shared (P.33)”.