Audio channel

When Christian IV enlarged Rosenborg 1613-15, he let his new Winter Room be supplied with audio channels in the floor so that the royal chapel could play “hidden” music from the basement. These audio channels has remained unknown for several centuries and were only rediscovered at the restoration in 2005. The discovery confirmed several diary entries that mentions Christian IV receiving his guests with music, but the guests being unable to see the musicians or Winter Room audio channels, which were covered by furniture.