I don't have 446 yet, but in case this happens when I get it.... it's only affecting your OTA? And if that's the case, then if I split the antenna cable at the 622 and send the antenna cable also to the TV directly (gee... might need a 3 or 4 foot coax) then I could at least watch LIVE broadcast stuff OTA with sound... right? Seems obvious to me to be a "yes" but just checking 
