When I built my home, I ran comm and audio cables everywhere. The plan at the time, was to have a "whole home audio" system. Well anyway, I did a lot of research on this, cause it's a log house, and there's no fixin' it later option available with log homes..... General rule of thumbs I learned from the Comm techs at work, were: If you must make parallel runs, keep comm and power 24" apart, and/or - 2" apart when crossing over at a 90 deg angle.
There's wiggle room, and that was about 15 years ago, so I imagine comm lines are shielded better nowadays. But I'd still try to and stick with those rules for any comm or audio line, if it were me. It's not something you can fix very easily after the sheet rock goes up.
