Audio and Video

Ground Loop Break Circuits and Their Operation

Here is one piece of additional information to my ground loop postings. Ground loops can be introduced when different components in audio systems are connected with standard audio cables, and these loops can cause annoying interference. Grounded audi components generally carry significant currents in their ground returns. Texas Instruments Application Report SLOA143 – October 2009:

GNU/Linux for beginners: How Audio Works

https://www.ghacks.net/2017/08/16/linux-audio-explained/ Audio in GNU/Linux has come a long way and nowadays functions fairly well when it comes to the simplicity that users migrating from Windows are accustomed to; but there are still some nuances and terms that new users may not be familiar with. ALSA is the framework that sound drivers communicate through. ALSA is nowadays

Web-Based Universal Remote for Under $4 (Probably) – Hackster.io

https://www.hackster.io/user70641842/web-based-universal-remote-for-under-4-probably-e9e929?ref=explore&ref_id=trending___&offset=4 Don’t buy a universal remote, make one. It’s cheaper, funner, universal-er, kind of, and you get to learn the ESP8266, kind of. You will need the Arduino IDE with whatever OS. Alternatively Linux and some C skills for the official Espressif stuff, but that’s unnecessarily challenging for this application. To get IR control codes

Smartphones killed the compact and now they’re coming for entry-level ILCs: Digital Photography Review

https://m.dpreview.com/opinion/7372168021/smartphones-killed-the-compact-and-now-they-re-coming-for-entry-level-ilcs But what does “better than my phone” picture quality actually mean? One of those key differentiating factors has been the “pretty blurry background” effect that an interchangeable lens camera is capable of producing: sharp focus on the subject, a soft blurry background. And you know that your phone can’t do it – until now. 

Assembly summer 2017 wild demos

https://m.youtube.com/playlist?list=PLJO4AtxKJiFMa-xhNLNpp-URxQH-7Ka6Q This YouTube playlist shows videos of interesting hardware plus software hacks. They can play computer demo multimedia with old game consoles, Arduino+LED sign, LEGOs and audio mixer… Many cool hacks I would say!  Assembly Summer 2017 event is still going on, more videos at AssemblyTV at YouTube and Assembly Summer 2017 pages.

Shield Current Induced Noise

The Rane Library has many interesting audio relaed technical documents. The most famouse of them is Note 110 Sound Systems Interconnections – it is a classic. Just few days ago I happened to look around at The Rane Library, and found some really interesting material related to audio systems and ground loops: Grounding and Shielding