Chirp, a pioneer of data-over-sound technology today announces its support of Arm Cortex-A and Cortex-M based architectures, enhancing device-to-device connectivity on any Arm-based product with audio capabilities. This follows the recent release of Chirp’s Arm SDK, which provides a software-defined data-over-sound solution that is optimised for Arm processors.

Chirp’s Arm SDK has capitalised on the Digital Signal Processing (DSP) capabilities of Arm’s Cortex-M4 and Cortex-M7 processors to engineer a robust data transfer solution that is both accessible and reliable without being resource intensive, enabling connectivity and application logic to reside on a single Arm core.

The SDK exists as a static library (approximately 740KiB in size) with a straightforward API for sending and receiving data via Chirp signals. The SDK implements the physical and data link layers of the data-over-sound OSI stack, with any additional layers such as encryption, application-specific protocols, or end-to-end transmission/QoS being easy to implement on top of the SDK if required.

As an Arm ecosystem partner, Chirp help developers to substantially lower the barrier to integrating data-over-sound into Arm-based devices for purposes such as device provisioning, proximity detection, two-way acoustic NFC and telemetry in RF-restricted environments. It also places the technology in the hands of device manufacturers and developers who wish to take advantage of a frictionless, low-cost solution for device-to-device communication. Chirp’s software-only solution can provide enhanced connectivity to any audio-capable smart device without adding to its existing bill of materials.

“By simplifying data-over-sound technology for Arm-based devices, we are able to extend our support of developers with a reliable data transfer solution and increase the footprint of data-over-sound as a cost effective and versatile capability to application connectivity. The demand for frictionless data exchanges between connected devices is growing constantly and we look forward to seeing our technologies work together to make communication between devices both simple and seamless for the end user,” commented James Nesfield, CEO of Chirp.

Chirp’s support of Arm-based technology follows the recent release of a joint white paper exploring the fundamental concepts and benefits of data-over-sound connectivity and key application areas within the Internet of Things.

To learn more about Chirp, please visit