how to change audio sample rate

hi,
when capturing footage i often get the message
'the audio sample rate of one or more of your captured media files does not match the sample rate on your source tape. This may cause the video and audio of these media files to be out of sync. Make sure the audio sample rate of your capture preset matches the sample rate of your tape.'

I have searched high and low but found no way to adjust the audio sample rate of my capture preset.

Please can you suggest what this means and how can I sort it out?

Thanks for your help
Sam