Its LEDs aren't the most responsive around, but they're fast enough. Aux In, Wave, etc. The output of the Internal mixer can be sent to any channels of the External Mixer via the Windows Multimedia Control Panel. Although this wasn't mentioned in the documentation, it's a very useful feature. Enjoy the Drive One of the most impressive features of C-Port is its multiple driver capability.
Latency is exceptional - as low as two milliseconds.
If your PC has enough power, you can run a plethora of different audio programs simultaneously and send them to individual outputs. Their resident expert John Fuller is very helpful and friendly and maintains a discussion board at the website. The website also has driver updates and documentation. The written documentation that comes with C-Port is well laid out, although its English is quite poor. The C-Port is by far the best value for money sound card I've yet seen.