The audio works, it's a decoder issue with the player you're using. I don't know what player you're using, but in mine i went into the settings and went into playback. I switched the audio decoder from Hardware to software decoder. That fixed it.
For the past 4 days, lots of USA Channels have been freezing and looping. I checked the announcements and there's no new announcements. Hopefully it gets fixed, it's been brutal.