You can evaluate the performance of your sound card using Sample Champion itself in a loop back configuration. If your sound card has poor frequency response, some improvements could be obtained using MLS filtering and equalization capabilities of Sample Champion. Nowadays all sound cards satisfy these requirements.
Some sound cards have peculiar characteristics.
They work very well also on slow computers because of their hardware architecture and powerful software drivers. These audio cards are recommended for Sample Champion. Other sampling frequencies are obtained by an internal frequency conversion that can give poor results with Sample Champion. Sample Champion, in Blinded Mode , operates a workaround. This is a consequence of the very high accuracy used for all internal operations.