Preparing Samples for Eurorack Samplers

Eurorack sampler modules open up a world of creative possibilities in modular synthesis. But getting your samples into the right format can be frustrating. This guide covers what you need to know about preparing WAV files for Eurorack samplers.

Why Eurorack Samplers Need Mono

Most Eurorack sampler modules have a single audio output per voice. In a modular system you route audio through patch cables to mixers, effects, and other modules, so one mono output per voice gives you the most patching flexibility. On modules that can do either, mono also stretches further: samples take half the memory, and some modules play more voices in mono than in stereo. Because of this, these modules expect mono WAV files.

Popular Eurorack Samplers

Here are some popular Eurorack sampler modules and their sample requirements:

Sample Preparation Workflow

Here is a typical workflow for preparing samples for Eurorack modules:

1. Collect your source samples (from sample packs, recordings, or synthesizers)
2. Convert stereo files to mono using It's mono, yo!
3. Trim silence from the start and end of samples
4. Normalize volume levels for consistency
5. Rename files with short, descriptive names
6. Copy to your SD card and test on your module

Batch Converting for Large Libraries

If you have a large sample library to prepare, batch conversion saves a lot of time. It's mono, yo! converts unlimited files at once with a proper summed downmix, and you can drop a whole sample-pack folder to convert everything inside while keeping its structure. Just drag your files or folder in, pick an output folder, and the app handles the rest.