Hi bcrummie,Here's a direct download link Realtek/MaxxAudio >>> MaxxAudio(It's from the Asus support page for your JM)
Good luck, and good gaming my friend!
GottiBoi55
Asus G750JZ-DS71 Windows 10 Pro (x64)
Intel® Core™ i7 4700HQ (2.40GHz)
Samsung 24GB Memory DDR3 1600 MHz SDRAM
SanDisk M.2 SSD 2x128GB in Raid 0 / WD-HGST-1TB HDD 7500-RPM
NVIDIA® GeForce® GTX 880M 4 GB GDDR5 VRAM
Second Monitor: Sharp Aquos 32"