TSAC: Very Low Bitrate Audio Compression
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https://bellard.org/tsac/
from fabrice bellard.
https://bellard.org/tsac/
from fabrice bellard.
Most digital voice modes fit in a 12.5kHz channel. LoRa would need 10 times that for the same bitrate. It certainly wouldn't be practical on the 70cm band, but it could be doable on 33cm if you are somewhere where there isn't a bunch of unlicensed users cluttering up the band.