CD Player
Any USB CD player can be used with Peppy Player for Audio CD playback. It's highly recommended to connect CD player to a powered USB hub rather than directly to Raspberry Pi. That's because as a rule CD Player needs more power than Raspberry Pi can provide through USB connector. If CD Player has its own power supply then it can be connected to Raspberry Pi directly.
The following images show Asus Blu-ray player connected to Raspberry Pi 3 through USB hub.
CD Player mode is disabled by default in configuration file /home/pi/Peppy/config.txt. To enable CD Player mode the parameter cd-player should be set to True in home.menu section:
[home.menu]
...
cd-player = True
After this change CD Player menu item should be available in Home menu:
If CD Player mode was enabled but CD player was not connected to Raspberry Pi then the menu option will be greyed-out:
After selecting CD track in CD Browser the CD Player screen will be displayed. If Peppy player can find CD album art on web site Discogs.com then it will be displayed in UI. If album art cannot be found then the default CD image will be displayed instead. Here are several screenshots of the CD player with CD album art fetched from Discogs.com web site for some CDs from my collection:
The functionality of all control elements on screen is the same as corresponding functionality for the File Player.