Orcas Airband streams, transcribes entire airband

Orcas Airband is a masterclass in edge DSP and applied AI, demonstrating how consumer GPUs can replace entire racks of dedicated radio receivers. By pairing wideband polyphase channelization with local speech models and LLMs, it turns raw RF spectrum into structured, real-time intelligence.

• –Custom CUDA polyphase channelizer splits ~19 MHz of raw VHF spectrum into 700+ parallel channels on-device, bypassing costly multi-receiver hardware arrays.
• –On-premise speech pipeline filters non-voice data transmissions before feeding audio through a dedicated aviation voice model tuned for noisy AM cockpit chatter.
• –Downstream LLM parsing extracts flight status, callsigns, and airspace anomalies to power an automated traffic board and emergency alerting system.
• –Real-world utility shone during a major regional ground stop, offering pilots instant ground-truth awareness when official communications lagged.
• –Creator plans to open-source the pipeline, laying the groundwork for a decentralized, community-hosted ATC monitoring network.