Active MP3 DJ Studio is an ActiveX control, developed by MultiMedia Soft, that helps adding sound playback and sound mixing capabilities to applications written with the most diffused development environments that accept ActiveX controls such as Visual Basic or Visual C++. 
The product comes in three different versions: Light (1 single player inside), Standard (2 players) and Professional (4 players).
Thanks to a set of intuitive-named methods, programmers will be able to perform sound playback, sound mixing, playlists management using the most diffused sound format MP3. 
The MP3 playback is based on the XAudio engine: XAudio provides the most robust and fastest MP3 engine implementation on all platforms, and is currently being used by hundreds of thousands of people around the world. 
Thanks to the use of DirectSound every player can have a separate control over the Volume, Pitch and Equalizer values. 
Every player provides visual feedback to the listener through embedded configurable VU-Meter, Spectrum Analyser and Oscilloscope: the possibility to create your custom VU-Meter is also available.
The control can also give to the programmer detailed information about the loaded sound files and is capable of retrieving the ID3 TAG header version 1.1 of MP3 files. 

Active MP3 DJ Studio is the Commercial version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around  119USD.