Overview

The Roland SP-404 MK2 is a portable sampler and performance tool. It features four FX buses (Bus 1–4), resampling workflows, and a wide set of on-board effects (compressor, EQ, filter, lo-fi, crusher, chorus, reverb, tremolo, phaser, flanger, SBF, Ha-Dou, filter drive). A key workflow is chaining all four buses in serial (Bus 1 → 2 → 3 → 4) and resampling once to bake the entire FX chain permanently into a sample.

Serial bus chaining and resampling

The SP-404 MK2’s four FX buses can be routed in serial, meaning the output of Bus 1 feeds Bus 2, Bus 2 feeds Bus 3, and so on. Resampling records the processed signal back to a new pad — baking in all four effects at once. Because resampling is irreversible, the FX chain should be considered carefully before committing.

FX rack presets

The Technical Kick Rack

General-purpose chain to make a kick more controlled, punchy, and mix-ready.

Bus Effect Purpose / Key setting
1 Filter (HP) Roll off sub-mud; use resonance to bump the kick’s fundamental frequency
2 Equalizer Sculpt: 80–100Hz for body, 200Hz for mud, 2kHz for presence; be subtle
3 Lo-fi Distortion, drive, grain, tonal colour — without drastically changing the kick
4 Compressor Adds bite; low ratio (~5:1), slow attack, fast release; don’t over-compress

Tip: leave headroom on the compressor — additional compression will be applied in the DAW later.

The Top Loop / Hat Rack

For hats, percussion hits, and top loops — removes harshness, adds space and movement.

Bus Effect Purpose / Key setting
1 Filter (LP) Remove harsh high frequencies; resonance to restore some presence
2 Tremolo Movement and panning; use triangle wave shape
3 Crusher Organic grain and texture
4 Reverb Width and space; use the reverb’s built-in filter to cut background hiss

The Big Bass Rack

Makes bass samples sound larger, rounder, and stereo.

Bus Effect Purpose / Key setting
1 Filter (HP) Resonance bump trick — emphasise low fundamental (same as kick rack)
2 Chorus Stereo width; keep subtle; add a little noise for character
3 Equalizer Boost sub (~80Hz); cut mids (~200–250Hz, sample-dependent)
4 Filter Drive Round low-frequency bump; use the filter only, no drive

The Creative Loop Rack

Experimental chain for complex loops (bells, textures) — adds movement and layered complexity.

Bus Effect Purpose / Key setting
1 Filter (LP) Tame highs before hitting modulation effects
2 Modulation (Phaser/Flange) Movement; keep balance low for subtlety
3 SBF (Side Band Filter) Adds a layer of complexity and sustains the loop
4 Ha-Dou Reverb + pitch-shift combination; “Mudap” setting for pitch; use sparingly

Organic house drum FX

Source: SP-404MK2 FX Tricks for Organic HOUSE Drums (ElectroNoir)

Philosophy: warmth and texture over punch; house drums should support melodic parts from the background. Apply reverb to everything with HP+LP filters on the return to avoid doubling sub-bass or adding harshness. Skip heavy EQ and compression at this stage — save frequency carving for the final mix.

Element Effects & key settings
Kick Cassette Simulator — Drive param (page 2); subtle grittiness without full distortion
Hi-Hats Tremolo (Pan mode, vary waveform per hat); Modulation (subtle pitch, vary rate/wave per hat); light Noise; Flanger; Reverb (longer if hits are sparse)
Snare/Clap Lo-fi (~50/50 blend, Cutoff max, experiment with pre-filter type); Compression; Reverb (non-negotiable)
Percussion Tremolo (Pan mode); Noise (slightly more than hats); Flanger; Reverb; Delay only when rhythmic breathing room exists
Low Tom Compression first (bring out transient + tail); Chromatic Shifter (±1 octave for melodic tone); long Reverb tail
Textures Crusher (alternative to Cassette Sim); Chorus (static width, no movement); long filtered Reverb; prefer reverb over delay on busy samples

SP-404 MK2 specific effects glossary

Resources