This review is about Volumio (the software) on Raspberry Pi 4. This is a brilliant piece of software and very well supported by the community and Volumio. There is a small learning curve, it's fun, interesting and does its job brilliantly. I am using Volumio to power my RPi based DAC Streamer and love everything about it. There are a lot of well-written plugins to accomplish pretty much anything that is within the scope of an audiophile quality streamer. The Volumio platform supports all popular streaming services at high resolution, including Spotify, Rune, several Web Radio stations, direct media play from USB devices, even supports YouTube hosting. On the hardware side, there are literally a whole host of DACs with varying levels of sophistication that ply well with RPi and Volumio. I am totally in love with Volumio and would happily recommend it to anyone who wants to have a bit of fun and learn to build a Streamer.