Creating an audio file
Go to ispeech.org and create an account. Login (use free version) and go to ‘enter text’. Fill out the text you want to be spoken in your audio file. I’d recommend to create a file that’s no longer than one minute. You can choose between male and female voices, different dialects and you can also adjust the speed of talking. When you think it sounds ok you can download the audio file in mp3. Now you’ve got just the spoken words. What I did was I used Audacity to add music to the audio file. You can download Audicity here: Audacity.googlecode.com/files/audacity-win-2.0.1.exe. When you’ve installed the program you can simply import the mp3 with spoken words and ad a music mp3 as well. Make sure both files are the same length so that the full song without the words doesn’t keep running. Also make sure the spoken words and the music are balanced right. Otherwise you won’t hear the words because the music is too loud. You can manage this on the left side of the menu. Than select export and save as .wave file.
Now you have an audio file to upload on the websites given below. Here you can add you URL to your profile and in most cases to the description of the audio file. Good luck!