How do I use the bass synth?

EP-40bass synthRiddim basssynthesizer
By ivan.codes·Updated Feb 2026·Official EP-40 Guide ↗

The EP-40 has a built-in bass synthesizer for creating basslines:

Accessing the bass synth: 1. The bass synth sounds are typically in Group B 2. Select Group B and play the pads 3. Each pad triggers a bass note at different pitches

Playing bass:

  • Keys mode — Play the bass chromatically across pads
  • Pattern recording — Sequence bass notes in your patterns
  • Live playing — Jam basslines over your drums

Bass synth parameters:

  • X knob — Filter cutoff (brightness)
  • Y knob — Filter resonance or envelope
  • Sound edit — Access more detailed synthesis parameters

Sound editing the bass: 1. Enter sound mode, select bass pad 2. Press shift + sound for edit mode 3. Adjust parameters: - Wave type (sine, saw, square) - Filter settings - Envelope (attack, decay, sustain, release) - Pitch/detune

Tips for dub/reggae bass:

  • Keep it simple — root notes and fifths
  • Deep sub frequencies work best
  • Slight filter movement adds life
  • Don't compete with kick drum frequencies
  • Use compression to keep bass even

Bassline patterns:

  • Reggae: Play on the off-beats (& of each beat)
  • Dub: Sparse, let notes breathe
  • Dancehall: More rhythmic, syncopated patterns

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