I added AirPlay 2 to my HiFi speakers with a cheap Apple router from 2012! - YouTube
Apple AirPort Express Audio Quality
Apple's Airport Express - A Simple Solution To Multi-Room Audio
How To Use AirPort Express As AirPlay 2 Adapter With Any Speaker System | Redmond Pie
How to Turn Any Speakers Into Airplay Speakers With an Apple Airport Express | Digital Trends
Apple Readying Third-Generation AirPort Express - MacStories
Planning to install outdoor speakers via airport express. I set up an outdoor AP for guests to connect and play music via airplay 2. Problem is I dont want them to 'see'
How to Create an Apple Wireless Speaker System for Home
AirPort Express Shows Up in iOS 12 as AirPlay 2 Accessory- The Mac Observer
Configure an AirPort Express as an Ethernet AirPlay Receiver - The Instructional
How to connect Apple's AirPort Express to any router to make an AirPlay 2 streaming target... - General Discussion Discussions on AppleInsider Forums
How to Turn Any Speakers Into Airplay Speakers With an Apple Airport Express | Digital Trends
Configure an AirPort Express as an Ethernet AirPlay Receiver - The Instructional
How to Create an Apple Wireless Speaker System for Home