Splitters!

I wonder if there could be a good market for a certain type of HDMI splitter.

The scenario I have in mind is this: you have a high end home theatre receiver from a couple of years ago, but it doesn’t support 3D video passthrough (ie. 1080p24 frame packed). What you would like is to have a splitter that you use with your 3D Blu-ray player. You plug the player into the splitter’s input. You plug one of the splitter’s outputs into a 3D TV or projector, and the other into a non-3D home theatre receiver. That way you can get both 3D and the highest quality audio available on a Blu-ray disc.

But this depends on what information the splitter conveys from the display/s back to the source. If it passes back to the source the fact that one of the devices (the A/V receiver) does not support 24(FP) video, then the player will not output that.

I’ll start asking around

 

Posted in 3D, Blu-ray, Equipment, Video | 4 Comments

Hail Hosting Matters

This web site is hosted by a US outfit called Hosting Matters. I selected it some years ago after checking out a couple of websites I admire. I had previously been with Bigpond. It was charging about $AUS60 per month to host my site, with significant limitations on data size and bandwidth. Hosting Matters charged $US59.60 per six months, and pushed both limitations up by about an order of magnitude.

More recently, it has effectively removed even those constraints. The price is still the same. The service has been uniformly excellent.

But over the past year or so WordPress updates have been flaky. It’s one of those things that I’ve been meaning to do something about for ages. Night before last I finally got around to it, and lodged a ‘Ticket’ asking if I needed to change some settings to make it work properly. (A Ticket is a help request.)

It turns out that my site was on an older server, and, in addition, the most recent attempt to update WordPress had broken something in my installation so that my WordPress dashboard no longer worked (although the site was still accessible as a user.)

So within 18 hours the folk at Hosting Matters had migrated my site to a new server and performed an automatic WordPress update. It now works perfectly. Next update will be the test I suppose, but I’m pretty confident after this kind of service.

All for less than $US10 per month.

 

Posted in Admin | 1 Comment

It’s a Mad, Mad, Mad, Mad Max

And it’s on Blu-ray. And it’s yours if you live in Aus and ask for it first in comments. The Australian DVD is fatally flawed, but this 1080p24 Blu-ray looks pretty decent. No box, no slick, no proper label, it’s a test disc with the same content as the purchasable one.

Posted in Blu-ray, Giveaway | 3 Comments

Digital radio now nearly usable in Canberra

On 23 February the trial transmission for DAB+ digital radio in Canberra was bumped up from 1kW to 3.1kW. Makes a big difference. I now get perfect reception in the house, and good enough reception in my office (despite the tin foil insulation and metal roof).

Sound quality on the commercial stations has improved, too.

So why my ‘nearly’ qualification? Still no ABC. Indeed, ABC says it won’t participate in the trial until it has an assurance from the Government that it will be permanent.

(Declaration: I went to a reboot of the system at Parliament House the other night, where I was presented with an OXX Digital ‘Vantage’ portable DAB+ radio.)

Posted in Digital Radio | 1 Comment

All Hail … Analog?

My brother kindly pointed me an article in the Wall Street Journal by Francis Fukuyama, entitled ‘All Hail Analog?’. Fukuyama is best known as a kind of historical analyst, generally of a conservative bent. In the late 80s and early 90s he was famous for his thesis on the theme of ‘The End of History’, in which he suggested that with the end of the Soviet bloc, human history is likely to settle down into a broadly liberal democratic arrangement, with little of the major ideological competition that had marked the decades leading to that time.

If you’re going to read something of his, I recommend his 1995 book ‘Trust: The Social Virtues and the Creation of Prosperity’.

But his view on analogue vs digital, which his article is about? Not so good. Here are a few of the surprisingly silly parts of the essay.

Ansel Adams’s iconic images of the Sierras were taken with an 8-inch-by-10-inch view camera, a wooden contraption with bellows in which the photographer saw his subject upside-down and reversed under a black cloth. Joel Meyerowitz’s stunning photographs of Cape Cod were taken with a similar mahogany Deardorff view camera manufactured in the 1930s. These cameras produce negatives that contain up to 100 times the amount of information produced by a contemporary top-of-the-line digital SLR like a Canon EOS 5D or a Nikon D3. View cameras allow photographers to shift and tilt the lens relative to the film plane, which is why they continue to be used by architectural photographers who want to avoid photos of buildings with the converging vertical lines caused by the upward tilt of the lens on a normal camera. And their lenses can be stopped down to f/64 or even f/96, which allows everything to be in crystalline focus from 3 inches away to infinity.

And what has any of this to do with digital vs analogue? Why, nothing! Why would you compare Adams’ camera to a standard SLR? There is no reason in principle why a large format digital camera could not be produced, one capable of a similar total amount of information capture. Such a camera naturally lends itself to tiny apertures. The f-stop rating is the ratio of the focal length to the diameter of the aperture. Large format cameras tend to have a longer focal length. Yes, you could have an f/64 digital, if there were a market for it.

Likewise digital cameras could be (and have been, as far as I know) built into flexible lens arrangements allowing lens tilt and other features.

Analogue vs digital in this context only has to do with the device that captures the light which has been presented by a camera body. Fukuyama is extolling the virtues of the old camera body, not the back end.

Perhaps there isn’t much of a demand these days for f/64 photography, given than exposures of a minute or two were often necessary.

In contrast to contemporary digital photographers who snap a zillion photos of the same subject and hope that one will turn out well composed, view camera photography is a more painterly activity that forces the photographer to slow down and think ahead carefully about subject, light, framing, time of day, and the like. These skills are in short supply among digital photographers.

He says this like it’s a virtue. A person with a digital camera can indeed slow down and think ahead. No doubt many of today’s great photographers do just that.

But a person with a view camera can’t photograph fleeting events. A digital camera provides options in how photography is conducted. A view camera limits them. Nothing wrong with that given the limitations of the time. But today? Does he want digital cameras to be carefully designed to be hard to use, to ensure that you have to obtain mastery in order to produce even a half-decent shot?

How many digital cameras will still be functioning five years from now, much less 50? Where are you going to buy new batteries and the media to store your photos in 2061?

This, in an article which opens by noting that the last Kodachrome processing facility in the US has just closed down. Need I say more?

Then he turns to music:

The only problem was that early CDs simply didn’t sound good: They were thin, harsh and unpleasant to listen to. It turns out that old-fashioned vinyl records, like photographic film, are actually a pretty good way of storing information. Sound is inherently analog; converting sound waves to grooves on a record does not involve the same loss of information as their conversion to digital data.

That last bit is absolutely wrong. Of course information is lost in converting to grooves on vinyl. As it is on the recording tape, and in the microphone.

Furthermore, more information is lost every time you play the LP! The pickup, no matter how fine, scrapes away some of the detail. Other information is masked by increasing levels of distortion and noise.

Digital isn’t perfect by any means, but its imperfections are known and fixed and are generally beyond the limits of human detection. And those early CDs? Nothing wrong with the CD as the carrier. The signal that was put on them was the problem. It was likely as not to have been EQed to sound good on vinyl, and then just poured into an analogue-to-digital converter. Play one of those CDs back on a great modern system and it will still sound like crap.

Let’s finish with a particularly silly straw man argument:

Don’t believe the marketing hype of the techie types who tell you that newer is always better. Sometimes in technology, as in politics, we regress. This point will be brought home to lots of people when their hard disks crash and they find they’ve lost all of their photos of baby Tiffany forever. Photos of my children, by contrast, are safely stored in the closet in boxes of Kodachrome slides.

That first sentence is the straw man. What techie types make such a silly statement as that? Of course, often newer is better, so the chance to say otherwise in specific cases is often limited. But no one I know would make that claim.

As for the photos of the kids: for a modest amount you can upload your digital photos for storage on another continent. If your house burns down, your Kodachrome slides — and memories — will be gone. Unless you’ve scanned them and put the digital copies somewhere safe.

Posted in Analogue, Audio, Video | 8 Comments

Cabasse La Sphere

Cabasse La SphereOkay, this is a little belated, but I doubt that I will ever get an opportunity to review them in my office, so I wanted to mention them here. I’m talking about the Cabasse La Sphere speaker system. Last Thursday the new Australian distributor, International Dynamics, flew me and several others in this field down to Melbourne to formally announce the distributorship, and to demonstrate Cabasse’s flagship loudspeaker.

Flagship in this context means, amongst other things, expensive. The stereo pair cost $199,000. Yes, nearly two hundred thousand dollars. For that you get the two loudspeakers with their stands, an active crossover unit, and the attendance from France (Cabasse is French) of Christoph Cabasse, the son of the founder, who will install and align the speaker system for you.

In addition to a suitable source device, you will also need to come up with eight power amplifiers (you can purchase Cabasse’s set for $39,999 — these are good for a total of 5,200 watts of ICEpower).

One of the speakers is pictured to the left. Each stands 1,400mm tall. The active part is a 700mm sphere. They are four way speakers, coaxially located. The bass driver are 550mm in diameter (22 inches).

Cabasse claims very high sensitivity for the four drivers: 93dB (for 2.83 volts input at one metre) for the tweeter and upper midrange, 94dB for the lower midrange and 96dB for the bass driver. Because each has its own amplifier, the different sensitivities don’t matter. What does matter is that they are all very high.

But can you trust a company claim like this? As it happens, late last year I reviewed a Cabasse sub-sat system. The Eole2 has little spheres — each with a tweeter/midrange coaxial assembly — and a subwoofer. Cabasse claimed the ludicrous sensitivity of 91dB. This from spheres only 130mm in diameter with no bass reflex port. The norm for satellites of this size is 86 or 87dB.

I measured 90.5dB in my room using bandwidth limited (500-2,000 hertz) pink noise.

So in Melbourne we listened to the La Sphere speakers in a very large room. They played a superb drum piece that turned out to be an intro for yet another version of ‘Take Five’. The precision of the drums  — stereo imaging and control — was incredible. A female vocal on the next track sounded odd, but only because the speakers instantly revealed the artificial reverb that had been added to her voice in the recording. Then there was a segment of the Schtschedrin ballet version of Bizet’s Carmen. This has an enormous amount of percussion going on and is extraordinarily dynamic.

My grandmother gave me a copy of this on vinyl when I was a teenager. I’ve since purchased a CD of the same version, which was from the Bolshoi Theatre Orchestra, and it is a very poor recording indeed, primarily due to harshness, but also somewhat dynamic and exciting. Later I purchased an EMI recording which was curiously flat and uninvolving. I now have on order the Chandos recording used at this demo.

My goodness, it was simply great. When you know a piece of music like this, and you know that a segment of the music ends with a crescendo of noise from everything in a percussion-heavy full orchestra, sub-consciously you anticipate that it will be restrained, or, rather, constrained … by the system. It will be like those vocalists who insist on moving the damned microphone away from their mouths when they hit a big note. The urgency of the moment is delivered, but at a lower volume than it ought to be.

Well with these speakers there was none of that. None. They hit the power burst and delivered cleanly, with the full frequency spectrum, and with immaculate control.

We listened to more, but that did it for me. Were I a multi-millionaire, I don’t think  I’d even bother auditioning anything else.

Continue reading

Posted in Audio, Equipment, Giveaway | 7 Comments

Imputing meaning to nothing

Lately I’ve been going through the oeuvre of Brian Dunning, specifically his Skeptoid podcasts. As I’ve previously noted, I think he probably does the highest quality skeptical stuff on the web, and a lot of his podcasts are on things new to me.

The concept of his ‘When People Talk Backwards‘ (episode 105) isn’t new to me, but some of his examples are startlingly good demonstrations of a theme I bang on about here quite often: our physical senses and their neurological support mechanisms are not objective recorders designed to capture the perfect truth, but practical devices which produce a workably accurate sense of what’s happening in a timely manner. Even if perfect accuracy were indeed possible, the processing time would be such that you would be eaten by a predator before you had a chance to realise it was there.

But back to Skeptoid. You can download the whole episode or read the transcript here. The item being discussed is claims by some that if you play recordings of human speech in reverse, you will hear what the speakers really meant. Silly, of course. In the course of demolishing it, Dunning notes that the human hearing mechanism searches out language amongst all kinds of noise and offers an example on the form of a clip of some manipulated sine waves. As he notes, these sound like someone speaking, but you cannot understand what they are saying. I certainly couldn’t, anyway.

He plays this clip three times. Then he plays a clip of a female voice saying a phrase at the same tempo as the noise clip. Then he plays the original clip again, twice. Both times it is perfectly clear what the clip is saying. As Dunning says, ‘it’s almost impossible not to hear the words that you’ve been preconditioned to hear’.

Hey, it’s as good as a circus trick you’d pay real money to see, so go download it and have a listen. This section starts at about 3:40 into the podcast, but it’s definitely worth listening to the whole thing (and the other ones as well).

As soon as I heard that demonstration, I decided to do a blog post. But certain deadlines got in the way so it turns out that I heard it two days ago and am only writing about it now. So, curious, I played the clip again through its three repeats. The first time through it was voice-like noise, the second time the noise began to resolve into words in my mind, and the third time it was clear as day what the phrase was. Every single word.

Now the phrase isn’t particularly interesting or memorable. It never occurred to me to try to see if I could remember it, but I am pretty confident that no matter how hard I wracked my brain I would have been unable to do so, even though it is only 13 words long. Indeed, in order to count the words just now I had to play back the noise clip to remind me of the phrase.

But by the third playing of some manipulated sine waves I had it perfectly, two days after having first heard it. Was it in my brain as a memory, and the noise clip helped retrieve it? Or had I learned the particular ‘accent’ of the ‘voice’ in the noise, allowing me to reinterpret it correctly? Or a bit of both. Or (of course) something I haven’t thought of.

So there we have it, perhaps the closest audio version of an optical illusion I’ve ever come across.

Posted in Imperfect perception | 4 Comments

Why most subwoofers disappoint me

I’m reviewing an Anthem MRX700 home theatre receiver. This has a very elaborate EQ system called ‘Anthem Room Correction’. It comes with a USB microphone and a long cable to reach to a computer. A disc with the software that runs the whole thing. A quite respectable looking adjustable microphone stand. And a long RS-232C cable. Because, unfortunately, RS-232C is how the receiver communicates with a computer.

One thing that this system does which most don’t is show you the results. And here is the result for my subwoofer, my old Paradigm Servo 15:

Paradigm Servo 15 frequency response

The red line is the measured response. Note how it is only 1dB down at 20 hertz? There are still very few subwoofers that can do that.

The power supply is getting a little buzzy, though, after all these years. I wonder if the transformer can be replaced.

Posted in Audio, Equipment | 1 Comment

Kitchenvalient

Rachel from Kitchen Valient… is the name of a four member music group, of which two of my daughters constitute half. They’ve been writing songs for quite a while, and practising pretty assiduously. They have now uploaded to Facebook a couple of their songs, freshly recorded. ‘Roman Days’ sees the whole group in action with Becki leading vocals supported by Rachel who also plays bass, Ginny on acoustic guitar and Sam on electric. ‘Camelot Blast’ was written and performed by Rachel and Sam.

Both songs are excellent. Go on, have a listen! They are both right here!

And believe me, this isn’t by any means the full range of their material. I shall post from time to time as they put more songs up. Some of them have got a very interesting metallish bite to them.

Update (7 February 2011): I am informed that the name is one word, not two. So I’ve changed the title.

Ginny from Kitchen Valient

Posted in Music | Leave a comment

Fantasia

I’ve just emailed off my review of the Blu-ray release of Disney’s 1940 classic, Fantasia, for publication in Australian HI-FI. But so much to write about and only 400 words available. I didn’t even get to mention the censorship.

In the Pastoral Symphony sequence the movie originally had a black centaurette kneeling before a white one, manicuring and grooming her. By 1969 this was judged to be pretty distasteful, so the film was edited to eliminate the manicurist (named Sunflower). To the right are roughly matching frames, top from the Blu-ray, bottom from the pre-1969 version. As you can see, the edit was done simply by zooming up to the top, right.

The bottom one is the best I could find on the web. By ‘best’ I mean ‘only’. I obtained it from this interesting post. I have retrospectively asked permission to use the shot (I rebalanced the colour to make it match the new version a little better).

About 66 minutes into the Blu-ray presentation the narrator Deems Taylor announces that they’re breaking for an interval, following which — uniquely in my experience — the movie’s copyright panel is displayed for a few seconds! For a moment I thought things had come to a premature end, but no, a few more seconds and the orchestra returned and the program resumed. Very strange.

Also strange, it mentions RKO Radio Pictures, at whose behest the picture was mutilated (since restored) for 1941 distribution. Note that the RCA Sound Sytem was mono.

Posted in Blu-ray, Cinema | 1 Comment