Bela Gem Stereo is now also available for purchase from Mouser. We greatly appreciate every direct sale made through our shop, but please note that Mouser may be the faster option if you can't wait to get your board. Note that Starter Kits are only available directly from us.

Change how you create with sensors and sound. Bela Gem is an open, real-time platform for expressive audio systems, powered by PocketBeagle 2.

Bela Gem Stereo is a compact, open hardware expansion board that turns the PocketBeagle 2 into a low-latency platform for real-time audio and physical computing. It combines high-quality stereo audio with rich analog and digital I/O, making it ideal for building embedded instruments, sound installations, and sensor-driven systems where timing and responsiveness matter.

Core Capabilities

• Stereo audio I/O for input, output, and headphone monitoring
• Low-latency real-time processing using the Bela software environment
• Analog and digital I/O for sensors, control voltages, gates, and triggers
• USB host and device support for MIDI, networking, and peripherals
• Open-source hardware and software, designed for hacking, modification, and research

What You Can Build

• Embedded and portable musical instruments
• Audio effects processors and experimental DSP platforms
• Interactive installations and responsive sound environments
• Sensor-driven controllers and expressive interfaces
• Wearables, robotics, and real-time audio + physical computing projects

What’s Included

The Starter Kit includes everything you need to power up and start building with Bela Gem Stereo straight out of the box.

Technical Specifications

Audio

• Inputs: 2 channels, up to 24-bit / 96 kHz
• Outputs: 2 channels, up to 24-bit / 96 kHz
• Monitoring: Headphone output, differential line out

Analog I/O

• Inputs: 8 channels, 16-bit / 24 kHz
  

Digital & Connectivity

• GPIO: 16 digital I/O (3.3 V logic)
• USB Device: USB Type-C
• USB Host: USB-A (WiFi, Bluetooth, Ethernet, USB MIDI)
• I²C: Dedicated pins and Qwiic connector

Power

• Input: 5 V (battery powered supported)

Mechanical

• Dimensions: 58 × 45 mm
• Height: 22 mm (assembled)

Compatibility

• Designed exclusively for PocketBeagle 2

Software & Development

Bela Gem Stereo runs the Bela web-based IDE, giving you a fast, browser-based workflow for developing real-time audio and interactive systems directly on the board. You can program in C++, Pure Data, SuperCollider, and other supported environments, with access to a large library of examples, tutorials, and open-source tools. The platform is designed for both rapid prototyping and long-term development, supported by an active community and extensive documentation.

Need More I/O?

For multi-channel audio, expanded analog outputs, and DC-coupled outputs for spatial audio and advanced control systems, take a look at Bela Gem Multi.