At Willowbrook the Music room will adjoin the Ballroom and the informal entertainment area on either side, and thus can be used as an ante-chamber to either room or can provide entertainment to either room when the bifold doors which run along either side are completely drawn back. In the case of entertaining in the ballroom, it could be where the orchestra or band is set up, or function as a side room in which to serve the refreshments and to where guests could retire from the main crowd for more intimate conversations.
Like the ballroom, the walls will be paneled in gilded boiserie, so that when the bifold doors into the ballroom are pulled right back, the two rooms become one. The pictures below of Norfolk House music room (disassembled and reassembled in the V&A museum in London when Norfolk House was demolished), show the general style we are aiming for, with the light coloured panels decoratively gilded with musical motifs.
Below: Miss Eliza Bennett at Pemberley
Pride and Pedjudice