Okay for this project you need simply the program Audacity and a microphone if you do not have Audacity you can obtain it here http://audacity.sourceforge.net/
Step 2: Recording
Okay to start off record a repetitive sound for however long you want your clip to go try it for about 10 seconds to start off so just go like tick tick tick tick tick tick tick tick tick tick or whatever sound like that you like but try and make it repetitive.
Step 3: Recording continued
Next click Record again and record another noise still repetitive but a different sound maybe ee oo ee oo ee oo ee oo or something and make it go for 10 seconds as well
Step 4: Finishing
okay now repeat step 3 about 3 more times and then play it back it will sound extremely weird you can also slip subliminal messages in the background if you wish like I put potato in the background when I did itokay now to export it as an mp3 you need to follow this to get an mp3 encoder http://audacity.sourceforge.net/help/faq?s=install&item=lame-mp3 once done you may click File Export as Mp3 and save it somewhere
This is my strange example see if you can detect me saying potato