[solved] No sound, CentOS 7.3 and 7.0.3 agent

We are building a new CentOS 7 image with all the most recent updates to it (so it's a 7.3 desktop).

These are vGPU desktops backed by NVIDIA M10's with open-vm-tools and the 7.0.3 Horizon agent installed. We do not have an HD Audio device set up on the VM.

We cannot get sound working on these desktops. Do we need to add an audio device or specify something specifically in the .vmx file?