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How to import wavetables into Piston Honda MK3

Industrial Music ElectronicsEurorack / modularVerified

Piston Honda MK3 from Industrial Music Electronics imports wavetables like this: eight 16-bit WAV files on microSD.

This guide gives the exact layout Piston Honda MK3 expects, the step-by-step load, the Hyperwave export settings that match, and plain fixes for the import failures the documentation warns about.

Everything here is verified against Industrial Music Electronics's own documentation or source code — sources at the end of the page, checked 2026-08-16.

What Piston Honda MK3 expects

microSD load of eight mono 16-bit WAV files named 1.wav through 8.wav — the eight files are eight independent Z-axis banks, each holding an 8×8 X/Y table of 64 waves × 256 samples (together the 8×8×8 = 512-waveform cube). All eight files must be present or the load fails.

Step by step

  1. In Hyperwave, export with the Piston Honda MK3 preset — 256 samples per frame, up to 64 frames, 16-bit — one export per Z-axis bank.
  2. Name the eight exported files 1.wav through 8.wav, padding any unused Z slots with the IME factory waveset.
  3. Copy the eight files to microSD and load them to fill the 512-waveform cube in one operation.

If something goes wrong

The module refused my float WAV files.
The module loads mono 16-bit WAV files — export with the Piston Honda MK3 preset (256-sample frames, 16-bit) instead of the float default.
My long table won't fit in one file.
The eight files are eight independent Z-axis banks, each an 8×8 X/Y table of 64 waves — a table can't exceed 64 waves per file. Export eight separate 64-wave tables (one Hyperwave export each) and pad unused Z slots with the IME factory waveset; the load fails unless all eight files are present.

Export settings for Piston Honda MK3

Hyperwave's export dialog has a preset for Piston Honda MK3 — pick "Piston Honda MK3 — 256 × 64" and the geometry below is what you get.

Piston Honda MK3 — 256 × 64
256 samples per frame × 64 frames · 16-bit PCM · 44.1 kHz

Sources