One question re Voice Forever...

We have the flip Motorola connected to Garage Band on the new Mac as suggested by Verizon last spring.  The messages are clear to hear firsthand, but have static when transferred.  Any suggestions to avoid the static?  Will the MP3 be a better solution?  My husband is a geek from the get go and won't spend 20.00 because he is certain he will ultimately figure something out.  I would like to save any more hair from turning gray. 

Cynthia