An open source suite of low-bit-rate digital voice modes for HF that lets you run high-quality digital voice over any SSB-capable amateur radio.

FreeDV takes the idea of digital voice on HF and makes it truly amateur-friendly: open source, experimentable, and designed by hams for hams. It uses the low-bit-rate, patent-free Codec 2 vocoder to squeeze clean speech into much less bandwidth than analog SSB, which can help reduce fatigue and QRM on crowded bands. You can run it as a cross-platform GUI app with a basic sound card interface and a regular SSB radio, or dive deeper with projects like ezDV and SDR integrations. If you care about advancing the state of the art on HF without locking yourself into proprietary codecs, FreeDV is absolutely worth putting on the air and experimenting with.

FreeDV is an open source HF digital voice suite using Codec 2 to deliver efficient, narrow-bandwidth speech over standard SSB amateur radio equipment.

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FreeDV – Open Source HF Digital Voice for Amateur Radio

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FreeDV – Open Source HF Digital Voice for Amateur Radio