At the Stommeln-based studios – on the cover incorrectly credited as "Diederdierk Studio (Cologne, Germany)" – vocals and drum programming were recorded. The collaboration with the King of Pop continued during the HIStory world tour with Dierks recording two shows at the Munich Olympiahalle using twelve analogue cameras as well as six digital ones. One of his two new digital mobile units which had been purchased in 1996 respectively 1997 was used for this job. The units in question were 18 meters long, respectively 21 meters long mobile recording units, transported on elaborate trucks, extensible in width and equipped with the latest digital equipment, picture direction monitors and mixing consoles. With up to twelve cameras on board they were able to record huge events. After the Jackson recordings the units came into action to tape the DOME shows for RTL II TV, the Bravo Supershow, the Sabine Christiansen Talkshow as well as the Pope John Paul II trip to Austria in June 1998. Several mobile units featuring HDTV technology were added to the fleet in 1997. This technology produced extremely high-resolution images by using special cameras and was particularly popular with the technology-affined customers from the US and Japan who tended to order numerous classical recordings. The Kirch Group for example booked these units for the recording of the Wagner Festival in Bayreuth. In 1997 the former engineering lab and the lobby of Studio 3 were turned into a new video-editing studio (avid room) in order to be capable of handling the numerous mixing and cutting jobs that came in. With its in-house avid editing suite, recorded images could be edited, mixed and processed. Today, having undergone several stages of restructuring the Dierks Studios group of companies is currently positioned as follows: The "Edit-Suite" is used as editing and screening room, colour grading, colour matching and colour corrections as well as the restoring of movies... all this can be done in 4K and HD. Studio 1 will be turned into a 4K screening room sized 100 square meters with a seating capacity for 30 people. This studio, too, provides facilities for restoration work, colour corrections and colour grading. Studio 3 combines analogue and digital recording technology. For sound analogue recording it is used however with a digital surface/solid state console meets D command – analogue warmth and digital speed go hand in hand. Studio 4 and 5 are used for