Audio Design Features

Audio amplifier power supply design - Part 2: External supplies, inrush current & RF emissions

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How audio processing algorithms help improve sound from small speakers

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Selecting resistors for preamp, amplifier and other high-end audio applications

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What is ambient temperature, anyway, and why does it matter?

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Match Point: Why maximum power means minimum sensitivity in filters and networks

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Do Class G/H amplifiers deliver higher audio quality and low power consumption?

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Designing precision analog front ends (Part 2 of 2)

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Interactive geometric sound propagation

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Designing precision analog front ends (Part 1 of 2)

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How to use FireWire for innovative new designs without distance constraints

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What really limits MOSFET performance: silicon, package, driver or circuit board? (Part 2 of 2)

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Development of a Spice op-amp macro-model for current-feedback amplifiers (Part 2 of 2)

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Signal Chain Basics #44: Get the best from your home audio system while maintaining low power and high-efficiency operation

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Power Tip 26: Current distribution in high-frequency conductors

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Development of a Spice op-amp macro-model for current-feedback amplifiers (Part 1 of 2)

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Blu-ray in the car

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Probing hints for accurate, repeatable power-supply measurements

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Power Tip 25: Improve a power supply's load transient response--Part 2

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Audio amplifier power supply design - Part 1: Power supply types & transformer considerations

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Buenos notches - the Filter Wizard vs. the vuvuzela

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Protecting content on MOST: Digital Transport Content Protection (DTCP) keeps data secure

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Proven 1394 technology trumps Ethernet AVB potential for the vehicle network

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Signal Chain Basics #43: Active Filters

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The importance of frequency stability in electronic musical instruments

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Automotive rear seat entertainment system - Your mobile living room

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Technical Papers

Show Me the Next-Generation HDMI

Hi-Fi Audio: Unveiling the Hidden dBs

Power supply decoupling and audio signal filtering for the Class-D audio power amplifier

How digital filters affect analog audio signal levels

775 Nanovolt Noise Measurement for a Low Noise Voltage Reference

Audio Guide

Reducing the complexity of sub-band ADPCM coding to enable high-quality audio streaming from mobile devices

Digital Signal Processing: A Practical Guide (Part 1)

Low Bit-Rate Audio Coding in Multi-channel Digital Wireless Microphone Systems

Extend Battery Life in Mobile Applications using Innovative Audio Headphone Amplifiers

Courses and Webinars

Shaping the Perfect Audio Codec: How Your SoC Can Benefit from the Right Audio Functions' Line-Ups

Telepresence in the Automotive Environment

Understanding and Optimizing Sampled Data Systems (Part I)

Understanding and Optimizing Sampled Data Systems (Part II)

Understanding HDMI: The Evolution, Ecosystem and Latest 1.4 Specification

Designing an Efficient HD Audio Chip - Challenges and Considerations for DSP Selection

CC8520 PurePath Wireless Audio Demo Kit

Fundamentals of Audio Networking

Common sources of Pop Click artifacts and solutions for PC Audio systems

Eliminating Audible Transients in Audio Systems

Teardowns

Ear bud headphones jam lots of complexity in a tiny package

Under the Hood: Sonos brings multi-zone digital audio to life

Bluetooth headset turns to SUN and goes green

Under the Hood: Handset holds surprise package

Under the Hood: The MP3 that broke new ground

Under the Hood: XM radio receiver makes waves

Under the Hood: Robot Guitar embeds autotuning

Esolo "MP4": Apple Nano clone adds some extras

Under the Hood: CSR evolves along with Bluetooth

Tear Down: Inside the Apple 8GB iPod nano

More Design Teardowns >

Reference Designs

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Commentary

In-vehicle Internet grows slow and steady

Rick DeMeis

The popularity of smart phone apps is driving demand for in-vehicle Internet connectivity.

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I feel the idea is a little exaggerated in its application and usefulness. If the driver of a ...

Power Management: Designing from a System-level Perspective

Peter Henry, Vice President, Power Management Group, Analog Devices, Inc.

It's no longer enough to look at power subsystem design separate from system-wide implications

Join  post comment   1 comment    last comment  GREAT-Terry
It is no doubt switching regulator is more important in today's electronics. I'm sure ADI is seeing ...

Why is NASA audio so bad?

Rich Pell

Posters at an audio forum offer up a variety of reasons (some serious and some not-so serious) for the low audio quality of NASA space mission communications.

Join  post comment   27 comments    last comment  Guru of Grounding
I think what's being overlooked here is that the channel is for voice communications in noisy ...

Mandating an FM radio in every cell phone: what are they thinking, and why?

Bill Schweber

Does the proposal to force handsets to include FM radios make any sense, or is it a futile stab at "back to the future"?

Join  post comment   30 comments    last comment  YevgeniT
My Samsung E250 also shows FM radio in the menu only with the corded handset is connected. I guess, ...

Engineer investigates a noisy, high gain amplifier

JAMES HAHN

Tension rises when all the usual steps to minimize noise fail to fix the problem with an amplifier for a seismic application

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I can add two little additional tales, one.. why does my amplfier oscillate at random, answer when ...

Building a better Bitchin' Betty

Brian Fuller

Dave Termohlen has accomplished much in his 25 years as an engineer, but he may just be hitting his stride with Bitchin' Betty.

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Robert, Nice project! Any tips on packaging? I have a friend that does CNC milling of Al and I've ...

Engineering can be noisy work, indeed

Karen Field

Engineer Bob McKillip wins our engineering investigations involving sound effects contest

Join  post comment   7 comments    last comment  WKetel
The comment about a robotic arm being built brings to mind the comments from a boss at a recent ...

You can join the ARTEMIS robots band

Colin Holland

ARTEMIS Industry Association, the European platform for embedded systems R&D, is creating the dynamic conditions where creativity and technology can collide and explode in a crescendo of ideas and innovation. This is the challenge and opportunity presented by the ARTEMIS-IA Orchestra Platform.

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It seems like an interesting and difficult idea. The challenge is is in the building. The ...

How to get an "A" in music

Bob Colwell

An EE undergrad exploits his knowledge of engineering to meet girls, ace a class in analog synthesizers

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I have mentioned this before but the 'heavenly chorus' we heard from the Neve 56-channel mixing ...

Audio cable break in, analog vs. digital nonsense

Rich Pell

A couple of recent examples of audio silliness show how two groups - audiophiles and popular "audio" columnists - seem to remain immune to any increased technical understanding of audio.

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I guess I just wanted the easy way out... :-)

Can we find common ground about "common" and "ground"?

Bill Schweber

These casually used words have serious implications which we ignore at our peril

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Humans understand language in a contextual way, and as such I think the discussion is almost (note ...

Don't diss the LDO

Bill Schweber

The low dropout regulator is a valuable tool in the power-supply roster; don’t assume its "drawbacks" should automatically rule it out of your design.

Join  post comment   4 comments    last comment  Duane Benson
There are still plenty of applications that are just fine with a three-terminal LDO. Even plenty ...

Audio awareness - a winner at the 2010 FIFA World Cup

Rich Pell

Who'd have guessed that the Soccer World Cup would become a vehicle for millions of people to learn more about acoustics and audio processing?

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As a soccer fan I found this audio background sounds as part of the celebration. Since soccer is ...

Generalisimo Francisco Franco is still dead - and so is Vinyl

Rich Pell

Music shipment data is out for 2009, and a graph of that data helps put the popularity of the various formats - i.e., digital downloads, CD and vinyl LP - into perspective.

Join  post comment   1 comment    last comment  calebcrome
Heh, you need to put your plot in dB!

The RCA phono plug: An outdated relic?

Rich Pell

When it came to choosing the RCA phono plug as a standard for consumer audio (and video) applications, "cheap" and "simple" clearly won out over technical considerations.

Join  post comment   6 comments    last comment  kinnar
RCA for Audio Video has become a standard, but it really needs some better connector in place of ...

Recent Comments

BalaLak  09.07.2010
Motion-sensing remotes: A ‘must’ for Web TVs and set-tops?
Functionality like PC mouse in a remote control is a nice idea, but remember that a PC mouse is an ...
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Most Commented

Apple says iPhone 4 problem is a math glitch

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iPad Fans?

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Reader Message Boards

Needed- Electrical Audio Designer- -Amplifier/pre amp for a vintage electric piano.

By HiStax on 07.18.2010

Looking for audio designer to design an updated amplifier/pre amp for a vintage electric piano. If interested, let us know and we can discuss details.

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last comment   07.20.2010  kinnar
Why do you want to design a new preamp for a vintage preamp, you can use any avaliable preamps in ...

How to figure about the class of amplifier from its operating voltage and current?

By Bhola_#1 on 07.20.2010

I am wondering how can we determine the class of amplifier just by looking at its operating voltage and current.

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last comment   07.25.2010  Bhola_#1
Thanks Dan for your informative comment. Yes, efficiency is a big factor since these devices goes ...

 

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