Just combo upgrade from OSX 10.9.3 to 10.9.4. After audio driver built using Multibeast 6.4.2, audio came back fine again even after wake up from sleep. After wake up, I also checked following and they were ok: Access to My Purchase, Airplay and Home Sharing with Apple TV, USB3 external HDD, Hardware monitor. I used only LAN wired connection and hence did not bother the wifi or bluetooth.
I have a GA-H77N-WIFI motherboard with ALC 892. I was continuously facing the sound not working after wake-up from sleep for the past 2 - 3 versions of MultiBeast. I set my system profile to iMac 12,1 and the problem simply went away. Thanks to all the posters who suggested this!
This worked for my Hackintosh build, much appreciated for the update. The issue I'm having with my GA-Z97N-WIFI MB build is the intermittent audio. Has anybody been able to get this to work with this MB?