I dont fly my PMDG 737 much but when I do the sound inside the cockpit at climb and cruise cuts off and on. Outside sound is okay. I am using Win 7 64 bit. I have X fi soundblaster gamer card with latest 64 bit drivers. Havent seen this problem in the forums. I fly just about every addon in FS9 and FSX and havent had issue with sound in them. Just wondering if this is soundcard issue with 64 bit OS.

Never mind, I found solution to problem. It seemed to be related to having my framerate set at unlimited. I scaled back to 60 and the cutting off of sound stopped. Sometimes there were some crackling sounds with it also. Seemed to be limited to the PMDG 737 only. Sure cant wait to get the NGX then I will probably get rid of FS9. This aircraft is the only aircraft making me hang on to it :(

Me too... full names here please.