Spoiler: Expect ongoing edits and updates to the first few posts I found the Volumio tips thread to be unmanageable because of the need to go back and correct and update instructions after feedback, a buggy release of Volumio etc. I've decided to make a dedicated thread per tip instead. Some SBAFriends 'reserve' initial posts, and I'll try that and treat the first few posts of this thread as an article, with later posts as comments. I'll post comments when there are major updates to the article. HQPlayer can make a huge difference to your audio quality. The right filters, applied with a powerful CPU, reconstruct digital music in a way that feels substantially more real and engaging than relying solely on a DAC. In this article I'll show how to set up HQPlayer quickly, and the settings I've ended up using, as well as explain the process to get there. I would rate the impact of introducing HQPlayer as similar to what I achieved from a major headphone/speaker upgrade. After much experimenting I've found an inexpensive Pi4 is able to run sophisticated HQPlayer digital reconstruction filters that greatly exceed the capability built into DACs. Many of us already have these Pi4's for Pi2AES or other audio HATs, so there is no extra hardware needed and we benefit from the high quality digital outputs. Don't follow this thread unless you already have a Pi-based streamer or are set on getting one. HQPlayer is easy to setup and use on your desktop and you'll get most of the benefits of this setup. If you're looking to feed upsampled DSD to a DAC, don't follow this guide. The Pi4 is great on PCM, not DSD. Highlights of HQPlayer OS: * Acts as an endpoint for Roon, Audirvana, BubbleUPNP etc, or can stream audio onto another Network Endpoint like a Pi running Ropieee * Upsampling with a lot of flexibility and control available * Convolution filters to do DSP correction for headphones and speakers * Speaker and matrix processing to mix channels, digitally crossover speakers etc. Not something I've tried. Here's a link to the long list By reputation HQPlayer is computationally intensive and requires a gaming computer. That isn't true anymore and you can get great performance using a Raspberry Pi 4 to crunch the data. That's fantastic when you already have a Pi4 feeding a Pi2AES, HiFiBerry HAT, a similar audio board or are using a Pi4 to feed a DAC by USB. The Pi4 happily runs high-tap filters, similar to a Chord M-Scaler, including closed form filters similar to the SuperComboBurrito in Schitt's premium DACs. Here's how HQPlayer is setup for me: streaming mostly from Roon which transmits a 44.1kHz Tidal or FLAC stream over the network to the Pi, where HQPlayer Embedded runs a high-tap upsampling and DSP filter and passes it onto my Gungnir DAC as 4x upsampled, 176.4kHz PCM. HQPlayer is very satisfying once it is set up, but it's tough to get started. The terminology, the documentation and the interface is not easy to navigate. Using this guide should mean you can stride past those hurdles. HQPlayer runs for 30 minutes at a time without buying a license. A license costs around USD250 which seems fair.