Please run Multi Room Audio Player and go to Main menu – Tools, select Jingles. Or you can use Ctrl-Alt-J hot key to show Jingles window.
Then go to Jingles – New Jingle and select your jingle audio file. A lot of audio formats are supported – MP3, WAV, WMA, M4A, MP4, AAC, OGG, FLAC and more. When your new Jingle appears in the left window you have to select Players or Zones to play this jingle with. You can select few items on each tab. For example you can play first VDJ jingle to Radio and Spare Player with one button click. Each tool bar Numbers button has a tool tip to help you.
I hope this screencast will help you 🙂