This has been driving me slowly crazy for months. I have a Roku Soundbridge. As it happens I need a new amp, so I can't use it at the moment. I already have two pretty high quality speakers. I've been hesitating buying a new amp because the choices are (to me) so totally confusing. I just want to do what the Roku Soundbridge does ("serve" MP3s over my Wifi) but do it in a more modern way, probably using a smartphone (Android) app. I have thousands of MP3s on a hard drive connected to a computer, in another room, and I just want to listen to them in the living room. I'd like to be able to select by artist, by album, maybe make up my own lists, etc. You can do this with a Roku Soundbridge, using a Plex server app, for example, but I bought this maybe 15 years ago, maybe more. It is so clunky I'm sure it'll soon be a collector's item, or an antique. Surely there must be something which can replace it? Anti-requirements - I am absolutely not in any way interested in streaming services which are paid for. - I am not interested in multi-room stuff: I just want to play in one room, but a different room to the one where the computer and hard drive are, using "serving over Wifi". Like Roku. - The ability to connect to a TV is of little interest/irrelevant. I just want to play MP3 files which I already have on my hard drive, over Wifi. - I absolutely do not want to put these MP3s on a dedicated HiFi device. The MP3s have to stay on the hard drive, for all sorts of reasons. - I do not want to use a single-speaker solution: one thing I don't understand about some of the "solutions" out there is that they seem to involve only ONE SPEAKER. What about the invention of stereo sound? Are we just meant to pretend it is not important any more? The MP3s I have are all stereo. I want to play through a (new) amp, into my two good speakers: one right-channel, the other left-channel. I just went into a well-known hi-fi chain in London and they were helpful. They suggested a DLNA-enabled device would be needed. They suggested a Yamama receiver with DLNA and "MusicCast" might do the trick. Alternatively they talked about a Sonos device. They started talking about soundbars. At that point I got confused. There seemed to be very very few solutions out there for people who want to listen to THEIR OWN MP3s (not paid streaming services).