Smallest audio file?

[Slickone]

What is the smallest, by file size, audio files I can make? I need to send some to someone on dial up. I tried mono MP3 at 32kbps, 32000Hz (lowest CDEX would go) but they're still 1MB each. Is that the lowest I'll get? WMA maybe?

 

[Slickone]

^

 

[Continuity28]

Normally, not counting voice only codecs like Vox (.vox) (53:1 compression) the highest compression you'll likely find is RealMedia audio (.rm) (16:1 compression). Doesn't sound as good as Mp3, but it should be enough... I'm not really used to it though, so I can't give you ideal settings...