The Belda Knowledge Base is a curated reference designed to help developers, engineers, and technical collaborators quickly understand and work with Bela hardware. It provides practical documentation, examples, and configuration details focused on the specific capabilities of Bela systems.
Whether you are connecting sensors, building interactive audio applications, or running real-time experiments, the knowledge base organizes essential hardware information in a clear, searchable way. This structured overview supports faster setup, fewer integration issues, and more confident prototyping.
Hardware Specifications at a Glance
The following table summarizes core hardware characteristics for quick comparison and reference.
| Model | Processor | Analog Inputs | Digital I/O | Real-Time Performance |
|---|---|---|---|---|
| Bela Mini | BeagleBone Black | 16 x 16-bit ADC | 64 x digital pins | Preemptive RT Linux |
| Bela Handheld | BeagleBone Black with enhanced power | 16 x 16-bit ADC | 64 x digital pins, multiple connectors | Preemptive RT Linux |
| Bela Standalone | BeagleBone Blue with real-time co-processor | 16 x 16-bit ADC, optional expansion | 64 x digital pins, motor control headers | Preemptive RT Linux with PRU |
| Skritter Hardware Kit | Compatible microcontroller modules | Custom analog front ends | Specialized I2C and SPI buses | Deterministic task scheduling |
Audio and Sensor Interfaces on Bela Hardware
Bela hardware supports high-resolution audio capture and playback, making it suitable for immersive installations, musical instruments, and responsive environments. The analog and digital input options allow direct connection of sensors, potentiometers, and custom electronics without additional conditioning in many cases.
Each board exposes multiple DAQ channels with configurable gain and input ranges. Developers can choose between single-ended and differential modes to reduce noise in sensitive sensor setups. This flexibility supports both precision measurement and expressive performance control.
Real-Time Performance and Determinism
Real-time performance is a core design goal, achieved through a preemption-enabled Linux kernel and optional PRU co-processors on certain models. These features reduce jitter and ensure consistent microsecond-level timing for control loops and audio processing pipelines.
Deterministic behavior is especially important when multiple sensors and actuators must be synchronized. The hardware and RT extensions allow Bela to meet strict timing requirements common in robotics, physical computing, and interactive sound systems.
Connectivity, Power, and Physical Integration
Bela platforms provide a rich set of connectivity options, including Wi-Fi, Ethernet, USB host and device ports, and built-in networking for remote monitoring. This enables standalone operation as well as seamless integration into larger distributed systems.
Power supply options vary by model, with some boards accepting direct barrel input, others supporting USB-C, and some including battery connectors for mobile setups. Headers and mounting holes make it easy to integrate Bela into custom enclosures or modular prototypes.
Key Takeaways and Recommended Practices
- Review the hardware specifications table to match your project requirements with the correct Belda model.
- Plan your sensor and actuator wiring using the provided digital I/O and analog input documentation.
- Leverage real-time features for applications that demand deterministic timing and low jitter.
- Use the connectivity options to build distributed or remotely monitored installations.
- Follow the recommended power and integration practices to ensure long-term reliability.
FAQ
Reader questions
How many analog inputs does the Belda Handheld provide and what is their resolution?
The Belda Handheld provides 16 analog inputs with 16-bit resolution.
Can Belda Standalone run without an external network connection?
Yes, Belda Standalone can operate fully standalone, with or without network connectivity.
Is it possible to extend digital I/O on a Bela Mini using external boards?
Yes, you can extend digital I/O on a Bela Mini using compatible carrier boards and expansion shields.
What kind of real-time guarantees does the Belda Handheld offer for audio control loops?
It offers microsecond-level deterministic scheduling through a preemptive RT Linux kernel, suitable for tight audio control loops.