Please run Multi Room Audio Player and go to the Main menu – Tools, select Jingles. Or you can use Ctrl-Alt-J hotkey 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 a 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 🙂