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How do I chop a sample?

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

Chopping lets you slice a sample across multiple pads, either automatically or manually. Access chop mode with shift + sample.

Auto-chop

Press shift + sample to enter chop mode, then press a group pad (Group A through Group D) to select which group to chop into. Note that this will reset any existing pad assignments in that group. Use minus and plus to set the number of slices. Riddim will auto-detect beat tracking points and populate the pads from bottom left to top right.

Live chop

Press shift + sample to enter chop mode, then press pads manually as the sample plays. Each time you press a pad, a new slice is created based on the time between presses. Keep pressing as the sample plays to distribute cuts across the pads.

Refining chop points

After chopping, select a pad and turn knob x and knob y to adjust the precise start and end points of that slice. Hold shift while turning either knob for finer control.

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