While they do claim, "Users can avoid this issue by avoiding the use of an external DAC in the connection process and directly plugging your audio device to your PC.", this only fixes the issue of ...

at this time there is no known way to work around this problem other than bypassing the external DAC and connecting headphones or speakers directly to the sound card built into the computer.

The MindWave DAC is a software-based digital-to-analog converter that delivers high-precision analog signals at low frequencies within a scalable and cost-effective design. Our DAC is designed to ...