WILL ROUTER AND WIFI PHONE INTERFER WITH COMPUTER TO RECEIVER HOOKUP?

i HAVE CABLE HIGH SPEED INTERNET, ASUS WL-520 ROUTER [NEED IT FOR A CELL PHONE [NOKIA] BECAUSE I AM IN A DEAD SPOT AND A ONKYO AV RECEIVER TX-SR606. I RUN MY COMPUTER THROUGH TO STEREO FOR MY MUSIC. I GET LOUD BUZZING NOISE IN MY SPEAKERS EVEN IF I AM ON OTHER DEVICES LIKE DVD PLAYER. INTERESTING TO NOTE THAT MY DOWNSTAIRS NEIGHBOR HAS BELL SATELLITE AND HAS EXPERIENCED THE SAME PROBLEM SINCE MY HOOKUP. ANY IDEAS WOULD BE GREATLY APPRECIATED AND I THANK-YOU IN ADVANCE FOR YOUR RESPONSE