After that evaluation period has expired, the driver stops working. The free evaluation version of the TUSBAudio driver works for an interval of 60 days without any limitation. To receive a free demo, prices or license agreement, please fill out the contact form. Technical support is provided directly by the developers. Our software is purely designed and implemented by our team in Germany - no outsourcing.
If there is more than one clock source then a clock selector unit must be implemented as well.