The new version of skype recorder is coming soon. It is almost finished and after testing will be available for download from this website. Few bugs, including sound distortion, which appears on some systems will be fixed.
Meanwhile if you have this problem with record sound, you can fix it manually. Download archive, unzip and put two files from archive into program folder (usually C:\Program Files\SkypeCallRecorder), please choose overwrite old files option during copying files.
Download link for fix - fix.zip
There will be one more significant change, program will be renamed.