Random noises through Mac's miniToslink output

[humanflyz]

So I'm using my MacBook's miniToslink port to connect to my DAC. I've been using this set up for two days now. But today, all of a sudden, I would get random noises--it's not clipping--just digital noise, which goes away in five seconds or so. The noise shows up randomly.

FYI: I'm using Play as my player, and I set the output to 16/44.1 in AudioMidi utility.

[Hopstretch]

What else is going on in your system at the time you hear the noise? Is it under heavy load from some other process?

[grawk]

Do you have an AT&T gsm phone?