Audacity is a free software that allows you to easily record and mix your voice with an audio track. You’ll be able to equalize and optimize the sound, add effects and export the result as an MP3, ready to be published here on Babelesque.
If you have never used Audacity, you could find the following instructions very useful.
The case we gave instructions about is a voice recording and with the adding of some music, but it’s ok the opposite too or any other way you want to try out.