I installed BOOM to increase sound on Macbook 2012. It works great. But when I plug in HDMI to connect my TV , audio does come out from TV but if I close the boom app then I do not get any audio out from my TV. Although in Sound preferences I do see option of Inbuilt , Boom and HDMI out with my TV name displayed , but if I select Tv as output then volume icon becomes greyed and no sound. Then I tried making some changes in Midi setup and audio came out of tv only if i select 44100 hz but volume icon still remain greyed out. Now I do not have problem with using boom but I will be connecting my Macbook pro to a Audio Video receiver so i want my Macbook to send out best possible sound to the receiver for movies and music. Receiver is 7.1 with Polk speakers so just do not want Boom to mess up sound. What should I do?