Digital audio watermarking technology has been integrated successfully many times since 2004 in online shops selling mp3. The container technology used for this allows fast and individual watermarking without any perceivable quality degradation. The publisher Digerot Media for example offers thousands of audio books from dozens of publishers through its online portal that are protected by Fraunhofer digital watermarking technology. The music service akuma.de has more than 500.000 songs of thousands of music labels in its catalogue protected in such a way as well. While the customers of both companies can use the audio data without any technical restrictions such as may be posed by older mp3 players or devices installed in the car, the rights owners still have a control instrument allowing them to pursue copyright violations. This makes watermarking technology a good compromise in negotiations with rights holders.