I'm looking for a program (preferably, but a pre-made mp3/wav will work) that will let me hear my sub at different frequencies. I want to use a program to create different frequencies from 30hz-300hz in a WAV/MP3 file.

A pre-made one will do, but I was looking to create one my self. What you do guys use to hear your subs preform at low frequencies? Not really looking for music, just a solid frequency for a few seconds then goes to a lower frequency ect...

Thanks.