Roland SP-404MK Reference Manual page 175

Appendix MFX List
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Reverb
Adds reverberation to the sound.
Parameter Value
TYPE AMBI, ROOM, HALL1, HALL2
TIME 0‒100
LEVEL 0‒100
LOW CUT FLAT, 20‒800 (Hz)
HIGH CUT 630‒12500, FLAT (Hz)
PRE DELAY 0‒100 (ms)
Explanation
Sets the type of reverb.
Sets the reverb time.
Adjusts the volume of the effect sound.
Sets the frequency range at which the effect sound is attenuated.
Sets the time before the effect sound is output.