Infinite Digits Zeptocore: Open-Source Handheld Sample Player
The Zeptocore is a handmade handheld device that brings sample manipulation to your fingertips. Created by Infinite Digits in Seattle, this open-source sampler offers an intuitive approach to playing with audio samples, whether you're creating beats on the go or experimenting with sound design.
What Makes It Special
At its core, the Zeptocore is built around simplicity and creative freedom. It plays stereo 16-bit audio files at 44.1 kHz sampling rate and stores your samples on an SD card with support for up to 32GB of storage. The device can recall up to 256 audio files organized into 16 banks of 16 tracks each, giving you plenty of room to work with your sound library.
What sets the Zeptocore apart is its approach to sample manipulation. The device features three distinct playback modes: Jump mode lets you navigate through audio slices using 1-16 keys, Mash mode allows you to toggle effects on and off in real-time, and Bass mode enables you to play melodic basslines. Each mode offers a different way to interact with your samples, encouraging experimentation and performance.
Effects and Sound Shaping
The Zeptocore comes loaded with sixteen effects that cover a wide range of sonic possibilities. You'll find saturation, fuzz, delay, bitcrush, timestretch, comb filter, reverb-like expansion, scratch simulation, and pitch adjustment. Each effect can be customized with up to two parameters and includes a probability setting, adding an element of controlled randomness to your sound design.
The built-in single-cycle wavetable synthesizer supports two voices - one sample voice and one bass voice with smooth crossfading between them. This adds another layer of musical possibilities beyond simple sample playback.
Sequencing and Connectivity
The sequencer in the Zeptocore doesn't force you into strict timing grids. By default, it's unquantized, meaning you're not locked into 4/4 time signatures. However, if you prefer tighter timing, optional quantization is available. With 16 sequence slots per mode, you can create and store multiple patterns to build up your performances.
MIDI connectivity is handled over USB, allowing you to sync with other devices or use external MIDI controllers. The device can send and receive clock signals, making it easy to integrate into a larger setup. For those who want even more control, Infinite Digits offers a companion device called "ittybittymidi" for connecting external MIDI controllers.
Portable and Open Source
One of the Zeptocore's most appealing features is its portability. The device runs on two AAA batteries or can be powered via USB-C. It even includes a tiny built-in 8-ohm mono speaker, so you can work on ideas anywhere without needing headphones or external amplification.
Being open-source means the Zeptocore's design is transparent and customizable. The creators at Infinite Digits have made intentional design choices rather than trying to replicate existing devices, but users are free to modify and adapt the device to their needs.
Different Versions
The Zeptocore is available in multiple forms. Besides the standard handheld version, there's a collaboration with Maneco Labs that resulted in the ZeptoMod, a Eurorack module version of the device. There's also the Zeptocade, an arcade box variant for those who prefer a different form factor.
Whether you're looking for a portable sketch pad for musical ideas, a performance tool for live shows, or just a fun device to explore sample manipulation, the Zeptocore offers a unique approach to handheld sampling that emphasizes creativity and accessibility.
