Category: Tech

Audio Files

While transferring a song from an LP, I watched the graphical decibel meter. While finding the maximum recording level I couldn’t help but notice how dynamic the recording is.

I’ve seen this before with certain records. The overall sound level can seem low, because the loud parts would cause distortion if the quieter parts were made louder. But there are ways to deal with this, typically called “normalize levels” or something similar.

But the funny thing is, songs on CD often don’t have this problem, because it seems their levels have already been normalized. That means their dynamic range has been reduced.

One of the advantages first touted for CD was its greater dynamic range compared to LP. But my impression of CD sound is that everything is made to sound loud. So much for dynamic range. This is certainly true of more recent releases, where the expectation is the music will be heard on an iPod or MP3 player.

The audio player below has the song that got me marveling yet again at how good some records still sound. This is “Ain’t Superstitious,” from Jeff Beck’s Truth, with Rod Stewart on vocals. I did nothing to eliminate pops or clicks. No equalization or loudness adjustment. The bass and drums take this to the volume input limit, yet the overall output seems low compared to most CD rips.

I bought this record for $1.50 at a pawn shop in Westfield during my DJ days, many years ago. The track is at the end of the side, where the phenomenon known as “groove compression” occurs, reducing the maximum level of loudness and the bass potential. So this recording has a lot going against it, and yet it sounds like this ……..

[audio:http://www.dograt.com/Audio/JAN07/AintSuperstitious.mp3]

….. and while we’re tripping out here, let’s listen to the first track of side 1. The first half of a side is where vinyl tends to sound its best. Beck and Stewart redid the Yardbirds’ song, “Shape of Things.” I’m hearing some things in here that seem to have perhaps been influential on Black Sabbath, but the overall effect helps to explain why the Beck-Stewart team didn’t hit it big the way Jimmy Page and Robert Plant did.

[audio:http://www.dograt.com/Audio/JAN07/ShapeofThings.mp3]

Wii Wiinner!

A year ago, Nintendo was the long-shot underdog of game consoles, but my son Eric insisted that the Nintendo Revolution (as it was known then) would be a winner. And he was right. The more I see of this product, the more impressed I am by it.

Wii Web access is done via WiFi. There are various channels dedicated to a single feature, including weather and, starting yesterday, news. But there’s also a customized version of the Opera browser.

I’ll try to get an A/V capture of the Wii while it’s browsing my blog. Everything except the video player seems to work. YouTube videos play pretty well, so I’ll assume my Flash player is incompatible with Opera. Eric has just used the Wii to enter a comment. Click here to see.

Oh Allison … His Ears Were True

Roy Allison, 1927-2016

I’m in my second round of physical therapy for a bad ankle, worn out by more than 30 years of running. The place I’m going to happens to be around the corner from 7 Tech Circle, in Natick, MA. This is an address that was familiar to me nearly 30 years ago. It was the original home of Allison Acoustics. 7 Tech Circle is a modest building, as seen in this aerial photo.

I own two pairs of Allison loudpeakers — the Model 3, purchased in 1979, and the LC-110, that I bought in 1988. Both pairs are still working perfectly. Roy Allison isn’t a household name like Amar Bose, but he is a legend in audio circles, especially in the Boston Area.

Before starting his own company, Allison designed speakers for Acoustic Research in Cambridge, MA. Motown Records went through many pairs of AR3 speakers when monitoring and mixing recordings in the 60’s.

Allison speakers sound very open and natural, favoring dispersion over detail, so they aren’t ideal for punchy studio recordings. But their virtues are immediately apparent to anybody who is familiar with live Classical music.

Besides having an excellent ear for neutral sound reproduction, Roy Allison is a true gentleman. He helped a competitor, Andy Kotsatos, start the still-extant company Boston Acoustics. (I also own a pair of Boston Acoustics A40 speakers, purchased in 1983.) Allison was put out of business during the recession of ’89-’95 in Massachusetts, when his bank called in his loans. Those were tough times around here, believe me, while the minicomputer industry was in its death throes, before the Internet boom saved us.

Roy Allison regrouped and formed a new company called RDL Acoustics, but it didn’t last long. Today he’s retired in Florida, but he’s lent his name to a new line of speakers. They sell replacement drivers for the original series, and every so often I tell myself I should buy a pair of woofers — just in case!

Going Out Of Style (Sheet)

Well, that was fun. Wasted too much time searching for a solution to the rendering problem in Internet Explorer 7 that was chopping off the bottom of the title — my name! — that I intend to replace with a picture eventually, anyway.

None of the discussions I found nailed down the problem, so I figured it out on my own. What fixed it was adding some padding to H1 headers in the cascading style sheet:

#header h1 {
/*display:none; This will hide the text in your header */
padding-top:50px; padding-bottom:10px;
}

The “hide the text in your header” comment was an obvious hint!

Wii-ality

Wii Hands

In the Wii hours of this morning Eric’s Christmas wiish came true at last. Those are his hands clutching the Wiimote — that’s Nintendo’s pun, not mine!

Thanks to this Web site, Carol was confident the local Target store would have the Wii in stock. She was number 9 in line for 70 units — by far the largest shipment since the day the Wii was released. If the Wii had kept its original name, the Revolution, Carol would have been Revolution 9!

Sensor Bar

The motion sensor bar fits perfectly on Eric’s TV. The digital camera captures the bar’s infrared light.