Q: Apple TV music problems-skips & plays with no sound

I bought a refurbished Apple TV from apple's website last April and it has been working fine, but lately it has started giving me problems when streaming audio from iTunes on my MacBook Pro. It will sometimes skip momentarily when playing a song, or even freeze up for a few minutes only to jump ahead to the next song or a later portion of the current track. Sometimes when it freezes, we will see the progress bar still filling up like it's playing, but there is no sound. Sometimes we see the little white "loading" dial, though not always. Everything else seems to be working on it, it's just the music that is giving us problems. I tried to reboot the apple TV (using menu & down button) but the problem is still there. I don't think it's a network issue, because other wireless devices in our home seem to be working just fine, and this seems to happen even when the apple tv is the only wireless device accessing the network. Any other ideas of how to remedy the problem?