[Osc4r86]

hi im having slightly a sound problem with my teac 101da sometimes the sound will become harsh and then would come and go by itself. now i did send it back to the retailer and they tested it out and everything was fine and they sent it back, i bought it so i can watch movies and listen to my music, it is hooked up to my mac mini. here's my theory when im on youtube or watching the streaming video it becomes a problem maybe because when streaming video the internet isn't a constant signal and when it starts to degrade it also degrades the sound signal as well because when i watch a downloaded movie it works fine and when watching a youtube video in 1080p the sound is working fine . so maybe its not the teacs fault but the internet signals, I'm just wondering if I'm right or wrong any help would be appreciated