The proliferation of IoT devices brings an increasing need for seamless, zero-config connectivity and provisioning. The up-and-coming solution to this problem harnesses audio as a machine-to-machine networking medium. This session introduces data-over-sound as an attractive alternative to RF-based communications for a multitude of IoT use cases, from Wi-Fi device provisioning to payment transactions. We demonstrate how Chirp's Arm-optimized data-over-sound SDKs provide audio networking capabilities to pre-existing audio I/O hardware, without the need for RF chips. We will showcase real-world use cases and discuss the affordances and challenges that arise from using sound as a medium for transmission of data.