No, it means pressing "r" in DSDPlus so that it writes the raw audio (preprocessing) into a .WAV file. Record a few minutes of it. Then press "r"again to stop the recording of raw audio. Then go look in your DSDPlus folder for the latest DSDPlus-Raw-Input*.wav file.
Zip that file up, rename the file to .zap, and send it back to
dsdplusfastlane@gmail.com
NOTE: There is a size limit for sending files via email, and that limit is different for almost every provider. You might have to upload it to a free upload site and then post the link for the author to download it or email the link to the author.
mike