Operating System Requirements: Windows 7 (32-bit), Windows 7 (64-bit) Windows 7 Driver for Sonnet USB 3.0 cards and Echo 15+ Dock's USB 3.0 ports that use the Fresco Logic FL1100.
The Left and Right Audio Channels on the Echo 15+ Dock are reversed in both the front and rear.
To fix in Mac OS:
1. Open the application Audio Media Setup.
2. Select USB Advanced Audio Device.
3. Click Configure Speakers.
4. Under Left front speaker, select Front Right.
5. Under Right front speaker, select Front Left.
6. Click Apply.
7. Click Done.