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audioXpress Magazine

audioXpress Magazine      October 2020

 

audioXpress Magazine October 2020

 

  audioXpress remains the authority on audio and reproduced sound by connecting manufacturers and distributors with developers, buyers and consultants around the globe! It's readers are the audio product designers, consultants, integrators, DIY enthusiasts, opinion leaders and your best customers. All of them agree that the coverage of trending topics, unique in the audio industry, make audioXpress a must read.

Every month, audioXpress combines the best educational articles on topic such audio electronics, speaker and headphone design, amplifiers (from tube to Class D), acoustics, practical test and measurement, audio engineering praxis, and standards. audioXpress provides inside stories on new audio developments, on R&D Stories, the most complete objective reviews of innovative products and software, and selects some of the best DIY audio projects from worldwide experts.

 

 

Comment
4 From The Editor's Desk
Spending Time Online
Things are different this year....
Editorial By J. Martins, Editor-in-Chief

 

5 Client Index

 

Columns
20 Sound Control
Testing Electroacoustical Systems
By Richard Honeycutt

 

24 Audio Scope 
Extracting Input Referred Op-Amp Noise Models
By Michael Steffes

 

64 Hollow-State Electronics
Design Considerations for a Hollow-State Mixer
By Richard Honeycutt

 

Features
28 GeerFab Audio D.BOB Digital Breakout Box
By Gary Galo
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
By J. Martins
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
By Manfred Lutzky
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.

 

audioXpress Magazine October 2020

 

44 Getting Started with Automotive Audio Bus (Part 1)
It's Not Just for Autos
By Brewster LaMacchia
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
By Jens Tybo Jensen
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
By Ken Bird
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
By Michel Nieuwenhuizen
Part 1 of this two-part project details the construction of a low distortion microphone buffer amplifier.

 

8 Market Update — Installation
Evolving Residential Installation
Home Entertainment and Workspaces
By J. Martins
Last year, in the first Installation Market Update feature published by audioXpress, we essentially focused on commercial applications and highlighting key technical trends for that specific segment. For 2020, we will concentrate on residential installation and new products for entertainment and personal workspaces, as companies are refocusing on this segment.

 

 

 

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