Is your recording analog or digital? If it is digital, you will need some signal processing SW of some sort to downconvert the recording to infrasonic frequencies. If it is analog, you would have to use some sort of frequency downconverter (heterodyne).
Of course, either way, it will no longer sound anything like the original recording so I would ask, why are you trying to do this, or what are you trying to accomplish?
Of course, either way, it will no longer sound anything like the original recording so I would ask, why are you trying to do this, or what are you trying to accomplish?