Direct boxes (also known as DIs, which stands for “Direct Inject”) began as a way to resolve a basic impedance mismatch between electro-dynamic guitar pickups (high impedance unbalanced) and sensitive studio electronics (quite low impedance balanced). Still today the primary function of DI boxes is to take an unbalanced, high-impedance signal and convert it to →
Scanimate is the name for an analog computer animation (video synthesizer) system developed from the late 1960s to the 1980s by Computer Image Corporation of Denver, Colorado. It is a form of analogue video synthesizer. The 8 Scanimate systems were used to produce much of the video-based animation seen on television between most of the →
Here is a collection of interesting videos on microphones and microphone technologies: Audio 101: Microphones Dynamic vs Condenser Microphones, What’s the Difference? Audio recording tutorial: The different microphone types | lynda.com XLR vs USB Microphones, Which Should You Buy? $22 MICROPHONE VS $3600 MICROPHONE | Andrew Huang Voice-over Microphone || DIY or Buy How a →
Android smartphones and PC use TRRS headset connectors. You can find details on that interface on my Telephone handset to smart phone and laptop posting. Ealier PCs used two TRS plugs (mic and headphones) for headsets. Because both connection types are still in use, sometimes adapters are needed. Here are some details of those adapters. →
I did earlier a teardown of broken Behringer B208D active PA speaker. Now it was time to get ot fixed. The problem was that sound level before distortion was very low and bass was missing. It seems that low frequency driver could output only 1-2V signal to speaker before distortion, and to get that the →
I have understood that hooking up an old telephone handset to work with a cell phone is simply a matter of connecting together the correct wires. You need to wire the microphone and speaker in the old telephone’s handset to the microphone and speaker in the cell phone’s headset connector. I decided to try that →
I ordered this cheap (around $10-15) 5.1 channel USB sound card from China few years ago. The device does not have markings on the box so hard to day which exact model it it was. It seems that there are several similar looking cards available at dx.com and banggood.com even today. CM6206-LX based USB Sound →
https://www.foundry.com/industries/virtual-reality/vr-mr-ar-confused Since the beginning of time, most new and emerging technology has nurtured an unhealthy attachment to acronyms, and virtual reality is no different. This article tells the basics of VR, AR and MR. →
Gaffer tape (also known as gaffer’s tape or gaff tape) is a heavy cotton cloth pressure-sensitive tape with strong adhesive and tensile properties. It is widely used in theatre, photography, film and television production. A common application for gaffer tape is securing cables to a stage floor, podium, or other surface, either for safety or →
Remote powering implies that the power equipment is not local but some distance away. It is an alternative to commercial power, which can be hard to get and/or expensive. Remote means that the powering and powered equipment are in separate buildings or at different external locations inside same building. This posting about remote powering in →