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 →
In this article I take a look at TU04 USB audio mixer, also known with many other names names like Teyun A4. This mixer can be found on many discount sites like AliExpress, Banggood, DHgate and Wish.com at low price ($30-50). For the price this audio mixer seems to offer quite a lot of features: →
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 →
There is a quite new electrical safety standard you need to know: IEC 62368-1. If you are working with electronics design, you need to notify this new standard. IEC 62368 is an entirely new product safety concept: it isn’t a merger of existing standards, but it does cover the older standards IEC 60065 and IEC →
I have earlier posted about Audio trends and snake oil. What annoyed then and still today in marketing and media that too often today then talking on hi-fi, science is replaced by bizarre belief structures and marketing fluff. It seems that there too many snake oil rubbish products marketed in the name of hifi. It →
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 →
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 →
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 →
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 →
Some time ago I saw The ultimate VGA to SCART adapter project at Hackaday with description: Accurate recreation of vintage arcades is becoming increasingly difficult. CRT monitors are rare nowadays and, even if you find one, it will probably not support the 15.7Khz horizontal frequency used by many old arcades. A good alternative is a →