TCM Audio not in sync

I'm having a problem with TCM channel audio not in sync. All other channels are fine. I went into my TV settings and switched back from SAP to Stereo and back again, but this has not resolved the problem. This is puzzling, because yesterday that channel was working FINE. I had not made any changes since yesterday to explain why it's not working right today. This happens occasionally and I'm not sure how to fix it. Please help.