The actual developer of this software for Mac is Lucas Menezes. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Never again worry about where to hide your secrets.
Put them inside mp3 audio files!
How it works:
DeepMP3 receives a normal mp3 audio file; and a message
DeepMP3 hides this message file inside the Audio, thus creating a new .mp3 file;
Of course, DeepMP3 can also scan mp3 music and Retrieve hidden information;