How do I use the bass synth?

EP-40tutorialguide
By ivan.codes·Updated Apr 2026·Official EP-40 Guide ↗

The bass synth is one of 10 built-in Supertone sounds on the EP-40. These are synthesized in real time and don't use any sample memory.

Accessing Supertone Sounds

To access the bass synth and other Supertone presets, hold Sound, press the dot button, then use minus/plus to browse through the 10 Supertone sounds on pads 0-9. Each preset has different characteristics including bass synths, dub sirens, and leads.

Playing and Adjusting

The Supertone pads are pressure-sensitive. Aftertouch (pressing harder after the initial hit) modulates pitch or LFO depending on the preset. In main mode, hold a Supertone pad and turn KnobX and KnobY to adjust its two parameters in real time.

Each Supertone preset has different parameter types including age, filter cutoff, filter resonance, unison, tone, length, sweep, LFO speed, and tune. The specific parameters vary by preset.

Saving Your Edits

To save your parameter adjustments, hold Shift + Sound for 2 seconds. The display will show SAV to confirm.

Recording

Once you've loaded a bass synth, you can record it just like any other sound. Press Keys for chromatic keyboard mode, then record either live (press Record then Play) or step by step (hold Record + press pads).

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