I got something much better than that....
just think of a sound you need, type in youtube something that will get you a video containing this sound and then copy the link to this video go to this fantastic website
http://www.vidtomp3.com and paste your link. This website is going to convert your youtube video into mp3, will make a link and you will be able to download it for free !!!
well, but to get a certain sound effect you will probably have to use music editor (I am using Free Audio Editor ) to cut off certain part from this mp3 video, its easy tho !!
now you can call me lifesaver xDD
Additional info from this website:
Welcome to our Video to Sound Converter! Exclusively at VidtoMP3.com
Scroll down to start turning your video or music video files (from YouTube, MegaVideo, etc) into MP3 files. Download YouTube videos or convert YouTube to MP3
VidToMP3 is a brand new site that allows you to download YouTube videos and the audio from non-copyrighted video clips on video sites! We support all of your favorites: MySpace, YouTube, Vimeo, Google video and many more. Remember to bookmark our Video to Sound converter for all your vid to MP3 and YouTube to MP3 needs!
We offer free file conversions from YouTube to MP3. Please review and abide by our terms of service.
The video sites that are currently supported are: YouTube, MegaVideo, Dailymotion, Metacafe, Veoh, Myspace, Break, iFilm, Bolt, ClipJunkie, ClipShack, CollegeHumor, FunnyJunk, Glumbert, GoFish, Grouper, Hallpass, MilkandCookies, Putfile, SantaBanta, Sevenload, Sharkle, Shoutfile, Vimeo, vSocial, Yikers, ZippyVideos... and loads more coming soon!
another website:
http://www.online-convert.com/doesn't support youtube but it can trim videos
http://www.online-convert.com/