Audio and Video

Audio cable testing articles

Here are two articles that could be interesting and entertaining to read. In this first article the writer uses audio analyzing tools to to debunk spurious claims made by audiophiles, HiFi journalists, and the high-end audio industry about the quality of their products. This article covers using audio analyzers and also using SDR software to

Signal processing tips from Hackaday

Signal processing is an electrical engineering subfield that focuses on analysing, modifying and synthesizing signals such as sound, images and biological measurements. Electronic signal processing was first revolutionized by the MOSFET and then single-chip digital signal processor (DSP). Digital signal processing is the processing of digitized discrete-time sampled signals. Processing is done by general-purpose computers

Smartglasses shoot lasers directly into the retina

Cyberpunk 2020! Omg lasers directly into the retina! Lol! Whew. I think I’ll skip this one, but it is super rad. Check out this article: Bosch Gets Smartglasses Right With Tiny Eyeball Lasers A tiny laser array paints images directly onto your retina https://spectrum.ieee.org/tech-talk/consumer-electronics/gadgets/bosch-ar-smartglasses-tiny-eyeball-lasers “Lightweight and slim, with a completely transparent display that’s brightly visible

CES 2020

CES (Consumer Electronics Show) is the world’s gathering place in January at Las Vegas for all those who thrive on the business of consumer technologies. This event owned and produced by the Consumer Technology Association (CTA)® has served for 50 years to introduce next-generation innovations to the global marketplace. Here are some interesting news I

Audio test videos

Here are some videos related to audio systems testing for use and your enjoyment: Left and Right Stereo Sound Test 20Hz to 20kHz (Human Audio Spectrum) 0Hz – 22kHz – Animation Reacting to Sound Frequencies How Old Are Your Ears? (Hearing Test) Bass Test 2-150Hz Frequency Sweep 1-100hz (Bass Test) 1080p HD Ultra Deep Bass

Silent attacks against voice assistants

Now there are two attack vectors to send commands to voice assistant from distance without anyone in the room hearing: ultrasounds and laser. Audio Hotspot Attack Crosses the Ultrasonic Beams to Send Silent Commands to Voice Assistants https://www.hackster.io/news/audio-hotspot-attack-crosses-the-ultrasonic-beams-to-send-silent-commands-to-voice-assistants-6d386644111b Lasers Can Take Over Voice Assistant Systems From Long Distances, Research Finds https://securitytoday.com/articles/2019/11/06/laser-hack-alexa-voice-assistants.aspx?m=1 https://news.umich.edu/a-laser-pointer-could-hack-your-voice-controlled-virtual-assistant/ From a distance

Linux USB drivers reverse-engineering

Developer Ben Cox sets out to get old VGA capture cards working on a modern Linux build. Interesting read for people interested in Linux, USB and video technology. Hackster.io reports: Ben Cox Revives Epiphan’s VGA Capture Cards with Custom Reverse-Engineered Linux Driver https://www.hackster.io/news/ben-cox-revives-epiphan-s-vga-capture-cards-with-custom-reverse-engineered-linux-driver-4fb8de896605 Having picked up a bulk supply of VGA capture cards for pennies