To use external sound files in mp3 designer, living postcards, you need to add a direct link to the mp3 file.
What is direct link? This is the link that will not change over time and will not be tied to a specific IP address.
Where to find such links? Try to use search engines. In advance to announce that the popular social network Vkontakte does not give direct links to mp3 files. On this page we have published the addresses of sites where you can choose music with direct links. If you know any sites with direct links to music files - can share in the comments on this page.
Write here your wishes, feedback and suggestions.