Roland SP-404MK2 Reference Manual page 36

Sampling (SAMPLING)
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
Some effect parameters may be shared in common, depending on the bus to which the effect is assigned. For details, see
"About the effect parameter save specifications and
36
"MFX List(P.114)".
sharing(P.31)".