If you have an ASIO driver for you soundcard the crusher can talk directly to the soundcard via the ASIO driver like other professional programs (e.g. Cubase) does. This bypasses the slow Windows DirectX and MME-Functions!

Choose the desired ASIO Driver. You will see some Information about the driver in the info box.

If your system has enough power, choose the 44100Hz Sampling Rate option. 

PC 400MHz and above: 44100Hz
PC 400MHz and below: 22050Hz

If your ASIO Driver supports an Option Dialog you can open it by pressing the Option Button. Note: If the ASIO Driver doesn't support this Dialog nothing will happen if you press this button. If the selected ASIO Device has many channels it can be useful to select the first Input- or Output-Channel that should be occupied. From that channel up the ASIO-Engine tries to get the next 2 input channels and the next 10 output channels.

All settings in this dialog will be saved after closing and will reload next time you start crusher-X.