Archive for the ‘linux’ Category

Upgrading the Gentoo kernel when running ZFS on an NVME SSD

Blending together the Gentoo Kernel Upgrade Guide with the excellent Gentoo/ZFS/NVME SSD installation articles by Guy Robot I synthesized the following set of steps, which I am well pleased to say went without a hitch first time :o) Please note this is an upgrade article only and assumes you already have a working system that […]

OpenRC – managing dependency when you’ve multiple network interfaces

tl;dr If you have multiple network interfaces and cannot guarantee that all will always be up, but have other services that depend upon network availability, set rc_depend_strict=”NO” in /etc/rc.conf. I habitually use a wireless network at home and tether my cellphone whilst out and about. I was finding that the VPN service refused to start […]

Using ffmpeg to downmix Dolby DTS or 5.1 audio to stereo

So you have a surround sound audio file (DTS, 5.1, quadrophonic, whatever) that you want to play back on your old-skool stereo hi-fi system. It’ll play, but you only get to hear front-left & front-right of the many channels. What’s needed is a way to mix the content of those other channels into FL & […]

Install Gentoo linux on ZFS

Gentoo, being a source-based linux distribution, has a very particular installation process. One has to make many decisions at every step along the way, since installation and configuration effectively happen at the same time, and certain things can be very hard to change once the installation has completed. The prime example of this hard-to-change-after-the-fact situation […]

How to configure (Gentoo) Linux to have ALSA bitperfect (& Pulseaudio convenient) sound

Preamble Bitperfect audio on linux (or any OS, really) means your music player’s transport must connnect directly to the sound hardware without there being a mixer in the way.Why? Two reasons: In order to mix, incoming audio streams all need to be resampled to a common audio format (usually 48kHz/16bit). This rides roughshod over those […]