https://cdeever.github.io/eds/docs/architecture/Recent content in Architecture on EdSHugoen-ushttps://cdeever.github.io/eds/docs/architecture/spdif/Mon, 01 Jan 0001 00:00:00 +0000https://cdeever.github.io/eds/docs/architecture/spdif/<h1 id="background-sound-around-the-house">Background: Sound Around the House<a class="anchor" href="#background-sound-around-the-house"></a></h1> <p>EdS did not bring music to the rooms of the house. A whole-house digital audio system was already doing that, was built years before EdS, and carries on exactly as it did. EdS listens in on it. This page is the short version; the project&rsquo;s own page has the whole of it: <a href="https://chrisdeever.com/electronics/spdif-audio-distribution/">S/PDIF Audio Distribution</a>.</p> <h2 id="whole-house-digital-sound-distribution">Whole-house digital sound distribution<a class="anchor" href="#whole-house-digital-sound-distribution"></a></h2> <p>One digital feed (S/PDIF) is sent from the basement to every room, and each room&rsquo;s own stereo plays it.</p>https://cdeever.github.io/eds/docs/architecture/boundaries/Mon, 01 Jan 0001 00:00:00 +0000https://cdeever.github.io/eds/docs/architecture/boundaries/<h1 id="layer-boundaries">Layer Boundaries<a class="anchor" href="#layer-boundaries"></a></h1> <p>Each component of EdS is built to do one well-defined job, and to do it without knowing how its neighbors do theirs. It takes a plain input, returns a plain output, and keeps everything in between to itself: much as abstraction and encapsulation work in object-oriented programming, applied to services and devices in place of classes.</p> <p>That is what lets each part be built, tested and tuned alone, and replaced without the others noticing. <code>palette</code> can be tuned against a folder of JPEGs with nothing else running. A different diffuser wants a different gamma curve, and that changes the firmware and nothing upstream of it.</p>