Sound Cuts Out After 6.4 (No Connected Devices)

Since updating to 6.4 my audio cuts out after only a few minutes of play. This happens every time I'm in-game. I do not have anything connected to my PC other than mouse and keyboard. I've confirmed that other sounds (outside the game) continue to work correctly. Restarting the game is the only resolution, and I'm more likely to just play in silence because restarting every few minutes is simply unacceptable.

When submitting a bug report, please use the below template and thoroughly fill out the necessary information.

Date & Time: Since 6.4
Frequency: every time I play
World name: Faerie
Character name: Atlas Frailheart
Retainer name:
NPC name:
Monster name:
Class/Level: WHM lvl 62
Party or solo:
In-game time:
Area and coordinates:
Housing:
Steps:
1.
2.
3.
*Add more steps if necessary

Connection Specs
- Type of internet connection/provider: Cable / Xfinity
- Modem maker/model number: X-Fi modem from Xfinity

■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

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Laptop Model Name:
Laptop Model Number:

Gamepad Manufacturer:
Gamepad Model Name:
Gamepad Part Number:

Browser Information
- Name and version of the browser currently in-use: Chrome, updated
- Internet Explorer Version:

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■ PS4 Specs

Model Number of the PlayStation®4 You Are Using
- Model Number:

Model Number of the PlayStation®Vita You Are Using
- Model Number:

Information About the Peripherals You Are Using
-Type:
-Maker:
-Model Number: