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bandwidth just like fusion has the wide and the narrow mode. Wide is basically no forward error correction, but the narrow mode which is a standard one that has forward error correction. What that does is when the vocoder digitizes your voice, it bundles an extra mathematical parity bit alongside the actual audio data. That's where this recovery information comes from. If you have static or a weak signal and it corrupts the transmission over the air, the receiving radio can use the extra parity bits and it mathematically figures out what's missing from the voice data and it can reconstruct the audio that's missing seamlessly. Now these systems used to be an arm and a leg because processors were very expensive to put in. Now with arm architecture processors are passing, they're very cheap. So all this stuff that was hard, almost impossible in the 80s, difficult in the 90s is super easy today which is why we see a proliferation of these.