Tiny Voicemailer

[Ken Norris]

Howdy,

I'm working out ideas for a tiny voicemailer in different venues.

Not knowing much about Win/PC machines (I'm a Mac person), I'd like some
advice on what the best, easiest, most popular sound file formats to use on
Win/PC 's are. 

I would like my folks to be able to play back automatically in their email
(attachment-in-body). I'd like bit-rate control, in case I want to send them
music from our band.

Ideas?

TIA,
Ken N.