6/14    I have a bunch of voice recordings (for foreign language
        listening practice), currently in .wav format, recorded in mono
        at 22Khz.  I want to convert them to mp3, and am trying to
        figure out what would be the right bitrate/quality to minimize
        the filesizes with reasonable sound.  How does one determine this?
        \_ 32 kbps, 22khz, mono. go lower if you'd like.