The devil is in the detail...
and preparation is everything. Every event organizer or mobile DJ has probably already experienced it: The dance group brings its music on a USB stick. The singer brings his playback on an audio CD and the opening dance of the bridal couple is stored on an SD card. During the preliminary talks there was of course no mention of all this, because it is about surprises for the bridal couple or the jubilarian.
All those who are prepared can relax: With a rack that always holds an appropriate player with CD and MP3 player. Devices with a dual-player function also serve as a back-up for putting on CDs and mixers. A well-equipped rack has thus already saved some mobile DJs from breaking out in a sweat.