This page allows you to control which sound card(s) VDJ uses. If you have
multiple audio cards, you can use VDJ's Preview/CUE functions on a secondary
audio card. For example, you may use Headphones with one sound card so that
you can preview a file before it goes over the main mix.
Alternatively, you can use the headphones to assist with Beat Matching two files,
with the help of the Pitch/Tempo control.
