This page describes additional features which have been left out of previous pages to keep things simple.
For most songs, lyrics can be viewed on the iPad. You can view the lyrics while browsing though the collection, or on the "Now Playing" panel.
Where do the lyrics come from? After adding a CD, I find song lyrics from the many sites available on the web and download them to the NAS drive for instant access from the iPad.
When there's no music playing, the monitor screen shows random shots from our photo library, changing every 30 seconds. The photo files are stored on the NAS drive. They're displayed by the same web page (monitor.html) as "What's playing".
The jukebox is actually available in three different rooms. Most "multi-room" installations allow you to listen to different things in each room, but that's of no interest to us, and all the rooms get the same music.
Each room has its own remote control. When you play music with one remote, the others get updated immediately. One of the "remote controls" is in fact Safari running on a desktop PC.
All three amplifiers are fed in parallel from the DAC outputs.
One room is difficult to get cables to. The audio signal goes over CAT5 cable with baluns at each end. The monitor is a low-cost netbook PC running its own copy of monitor.html.