View Cool Guy's post (I think a cool idea ...) for this comment.

Nintendo 3DS Sound Community

¿GamuCibe√FrutigerXP-2004

5 days ago ·Spoilers

It would simply be upload a file from your ad card and since 3ds sound files are only 10 seconds long it wouldn't take long to upload. The only issues would be storage and moderation (mainly the former)