Vinyl to Digital
in [UK Mac]
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From: Rowland McDonnell on 17 Mar 2010 00:13 Peter Ceresole <peter(a)cara.demon.co.uk> wrote: > T i m <news(a)spaced.me.uk> wrote: > > > Hmm, I wonder if this sort a thing is down to experience (in that > > field, like PeterC - BBC although I'm not sure he's seen said effect) > > Nope, even looking for it I don't see those artefacts. But maybe our TV > is good that way. > > My son in law claims to see them, so maybe it's inherent in the person. That's clearly nonsense: it's inherent in the picture, but only some people have senses that detect the defect. > As for hearing the whistle from CRTs; 15625Hz. It came from the line > scan transformer, and was the noise of the core changing shape each time > it generated the voltage to drive the beam across the screen. Of course > flat screen TVs don't have those... I used to be able to hear poor > quality 625 sets whistling away (good ones suppressed it in various > ways) When I was young, they *all* made a horrible racket as far as I was concerned. Some were worse than others, and all of them were unbearable first thing in the morning. And I once passed (on foot) a cashpoint that was making such a loud whine from its CRT that it hurt my head /even over the other side of the road/ while other passers-by seemed to notice nothing at all. > and once, at an electronics show in 1962, I walked behind a rack > of 625 test gear and the noise was like having a very fine skewer spiked > through my head. 405 line sets (if you ever came across those) whistled > at 10125Hz- almost bass register... A jest. 10125Hz is quite a high pitch - well beyond what's needful for clear speech reproduction, for example. > Now, I doubt that I could hear either 405 or 625. > > One curiosity was that the sets used an oscillator that ran free at a > lower frequency, and each line scan was triggered by the broadcast line > sync signal, a square wave that was differentiated by a simple LC > circuit to give a really sharp spike at the leading edge, and that would > set the scan in motion. This meant that if there was no picture signal, > you'd hear the lower scan frequency, and when a picture came up, you'd > hear it change. When the Beeb switched picture to another source (say a > studio to an OB) and you lost picture for maybe a frame, you could > actually hear it more easily than you saw it. I'd often wondered about that. Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Rowland McDonnell on 17 Mar 2010 00:22 Howard <Howard.not(a)home.com> wrote: [snip] > It's not like when CDs came out first and we were all told that only the > top 100 would make it to Cd Who made that claim? I never heard it, and it's obvious cobblers - although low-selling oddities were obviously not going to make it to CD any time soon, if at all. > and if we wanted our more unusual LPs then > we needed to do the conversion. You can get almost ANY LP on CD now. I've got /loads/ of LPs unavailable on CD. Thankfully, most of them are not of musical aesthetic interest to me[1]. There are firms out there that specialize in tracking down the rights to `stuff that's not out on CD but ought to be' and it's often very very hard to do so. Yeah, sure, if you want something that was in the pop music charts in the 1970s, I'm sure you can get it, along with most of the charting albums from the '60s. But that's a long way from `almost any LP'. An awful lot of titles have been deleted and simply aren't sold any more. And never mind the publishers that went bust, tapes being lost/destroyed/whatever, artists deciding to withdraw things (it happens), and so on. I think it's reasonable to suggest that most LPs published haven't made it to CD. I'd be astonished if that were not the case. Yes, yes, I'm sure that most of the LPs that people here know about are available on CD, but I'm talking about the set of "all LPs published in the world, ever". [snip] Rowland. [1] I've got one 12" something with a picture of a man on the front, wearing nothing but sweat, socks on feet, and a saxophone. When I explained to the bloke serving in the record shop that I just had to buy it because of that picture, I got a very odd look. <shrug> They'd've understood me if it had been the Portobello Road, but this was Bolton. Thing is, I'm not sure I've ever played the thing... -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Peter Ceresole on 17 Mar 2010 03:53 Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > Then again, having met old looms in operation, they're a lot noiser than > the spinning machines. A *LOT* noisier... Which is why I mentioned that it was a weaving mill, with flying shuttles. Shipwrights suffered from the same problems, from working in ships' hulls under construction, when riveting was going on. I worked on 'All Our Working Lives' and the accounts in the shipbuilding programme reminded me forcefully of that weaving mill in Preston. -- Peter
From: Adrian Tuddenham on 17 Mar 2010 05:12 Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: [...] > And Murdoch is telling them lots of bad things about the BBC to warp > their judgement so that he can have the BBC run down so as to clear the > field of competition and so as to allow an even greater reduction in the > quality and originality of the already low-grade shoddy programming that I've just been reading about that in Radio Pictorial 1934 - except that it wasn't Murdoch in those days, it was some other un-named business concern. -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk
From: Peter Ceresole on 17 Mar 2010 07:43
T i m <news(a)spaced.me.uk> wrote: > Like joint projects tween Uk and US and one group working in Imperial > ... ;-( The most notorious example of that (crash into Mars, anyone?) was between two groups within NASA. The Brits are pretty good at using proper measurements now. It's only the Yanks who seem attached to their peculiar version of Imperial. -- Peter |