audioXpress - October 2020

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8 Evolving Residential Installation - Home Entertainment and Workspaces 20 Testing Electroacoustical Systems 24 Extracting Input Referred Op-Amp Noise Models 28 GeerFab Audio D.BOB- Digital Breakout Box Gary Galo shares his experiences with GeerFab Audio’s new D.BOB Digital Breakout Box, which is the first de-embedder that will also extract direct stream digital (DSD) from the High-Definition Multimedia Interface (HDMI) audio data.
34 Dealing with Communication Challenges In this article, audioXpress’ editor-in-chief addresses the lack of a communication protocol for organizations, and the problems of audio quality in existing forms of communications and conferencing tools we use.
40 Enabling High-Quality Voice Conferencing With the spread of the coronavirus, more employees are working from home and using audio and video conferencing systems. This has led to more discussions about audio quality, which depends on many factors—two major ones are the codecs used and their robustness.
44 Getting Started with Automotive Audio Bus (Part 1) -It’s Not Just for Autos In the first part of this four-part article series, Brewster LaMacchia examines what Automotive Audio Bus (A2B) is, its features, and its use with I2S and PDM interfaces.
50 High-End Class-D Audio Board for Arduino MKR Family This article details an Infineon amplifier board featuring integrated MERUS MA12070P proprietary multi-level Class-D ICs.
54 Coffee & Bluetooth Speakers - Desktop Speaker System Using Recycled Coffee Cans Build this 2.1 Bluetooth-enabled speaker system that demonstrates DIY and eco-friendly credentials.
58 Ultra-Low Distortion Microphone Buffer Amplifier (Part 1) - Construction Part 1 of this two-part project details the construction of a low distortion microphone buffer amplifier. 64 Design Considerations for a Hollow-State Mixer