The Lindemann audiotechnik musicbook: can be used to fully control all compatible musicbook: devices like musicbook: 20/25 and offers a unique range of functions for easy use and comfort. The musicbook: app allows to control all supported sources: Airable Web Radio and Podcasts. TIDAL and Qobuz Streaming Services. UPnP/DLNA Server. Usb. CD Drive. Digital Inputs.