When you have personal documents which you’d like to keep safe from snoopers then your first thought might be to encrypt them. But this isn’t always the best idea. Just seeing a “Mysterious.doc” file which they can’t open will be enough to tell others that you’ve something to hide.

The free DeepSound, though, offers a different approach. In just a few clicks it’ll take your documents and conceal them within WAV or FLAC files. And if anyone checks, now, all they’ll see is regular audio files which play as usual: there’s nothing to be suspicious about.

The program is generally very straightforward in operation. You select a WAV or FLAC carrier file, first; choose whatever documents you’d like to be concealed, click the Encode button and that’s about it.

Optional AES encryption adds even more security, if you need it

You can optionally decide to protect your files with 256-bit AES encryption, for maximum safety.

Then, in a click, the modified audio file is written to your chosen output folder, ready for emailing or whatever else you might want to do with it.

And only someone who knows what the carrier contains (and has your AES password, if you enabled that option) will be able to extract its contents.

The program is a little basic, particularly in terms of its file browser. This actually contains even less functionality than a regular File > Open dialog, and so for instance you can’t use it to browse to a network drive.

Still, DeepSound is also small, effective, easy to use, and generally a hassle-free way to protect your confidential files from prying eyes.