Saving voice recordings

Hi
We have a working app that records a student voice, saves the binary on a server letting the teacher download

However the files are big, and the upload does not always work, the upload seems to not complete, is this a problems with flex?

First does any one have the above concept working, recording voice, saving to server then downloading

Also is anyone recording / converting to as smaller format ie mp3

Last has anyone done the above with a media server ?

Sent from my iPad

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