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#1
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Alan Blumlein on radio tonight
BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan
Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d |
#2
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
Don Pearce wrote:
BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 Phase diagram is real funny to look at ... d Kind regards Peter Larsen |
#3
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
Peter Larsen wrote:
Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 Phase diagram is real funny to look at ... d Kind regards Peter Larsen I suspect the mics' polar patterns weren't of the finest. d |
#4
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
I suspect the mics' polar patterns weren't of the finest.
"Polar patterns"? They were probably omnis. (And, yes, I know that omnis don't necessarily have the same on- and off-axis responses.) |
#5
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
William Sommerwerck wrote:
I suspect the mics' polar patterns weren't of the finest. "Polar patterns"? They were probably omnis. (And, yes, I know that omnis don't necessarily have the same on- and off-axis responses.) Omnis? This is THE Mr. Blumlein we are talking about here, you know. d |
#6
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Alan Blumlein on radio tonight
On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce
wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia |
#7
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Edi Zubovic wrote:
On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You can listen on line - they stream. d |
#8
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Edi Zubovic wrote:
On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. d |
#9
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
On Sat, 02 Aug 2008 16:43:58 +0100, Don Pearce
wrote: Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. d Yes I've found that too. After reversing the right channel, I've got better results but less mono compatibility, there are some cancellations. It can be a tape alignment issue, too. Anyway, it seems that a channel is reversed indeed. I usually don't trust a correlation meter is such cases since there isn't much intensity stereo but the meter "pulls" to the wrong left side too much. Also, a m-s matrix yields m side lower than s side so it seems a channel is reversed indeed. The guys seemed to play a card game for this test. Thanks for pointing out, I'll try to catch this. Edi Zubovic, Crikvenica, Croatia |
#10
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Don Pearce wrote:
You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. I often find that things like that happen with MP3 conversion. A channel will get inverted, or the left and right channels will mysteriously swap, and then return to their original position. If there's a computer involved, it'll screw you some time or other. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) |
#11
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
"Don Pearce" wrote in message
... William Sommerwerck wrote: I suspect the mics' polar patterns weren't of the finest. "Polar patterns"? They were probably omnis. (And, yes, I know that omnis don't necessarily have the same on- and off-axis responses.) Omnis? This is THE Mr. Blumlein we are talking about here, you know. Yes, but in addition to devising the Blumlein technique of stereo recording (figure-8 mics, vertically coincident, angled at 90 degrees), he also investigated recording with spaced omnis. Peace, Paul |
#12
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
"Don Pearce" wrote in message
... William Sommerwerck wrote: I suspect the mics' polar patterns weren't of the finest. "Polar patterns"? They were probably omnis. (And, yes, I know that omnis don't necessarily have the same on- and off-axis responses.) Omnis? This is THE Mr. Blumlein we are talking about here, you know. Forgive me. The brain must be in another country. As someone who made many, many Blumlein recordings, I don't know how I could have made such a mistake. I think what I was thinking of was the shuffler. |
#13
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
On 02/08/2008 Edi Zubovic wrote:
On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia Go he http://www.bbc.co.uk/radio4/archivehour/pip/i7o6j/ and click the listen again button. It's only up for seven days after the broadcast date. -- John B |
#14
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
William Sommerwerck wrote:
"Don Pearce" wrote in message ... William Sommerwerck wrote: I suspect the mics' polar patterns weren't of the finest. "Polar patterns"? They were probably omnis. (And, yes, I know that omnis don't necessarily have the same on- and off-axis responses.) Omnis? This is THE Mr. Blumlein we are talking about here, you know. Forgive me. The brain must be in another country. As someone who made many, many Blumlein recordings, I don't know how I could have made such a mistake. I think what I was thinking of was the shuffler. My thought too OR a simple one channel polarity reversal, but I didn't investigate and eventually I missed it online because of a my new, second hand, surround receiver. I plain forgot about it. 6 hours vanished in getting the thing set up just as stereo preamp, including enjoying that its auto eq function got the loudspeaker bass and low midrange eq just right. I wish they'd use better qualified staff to translate the manuals ... Kind regards Peter Larsen |
#15
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
On 02 Aug 2008 23:16:06 GMT, "John B"
wrote: On 02/08/2008 Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia Go he http://www.bbc.co.uk/radio4/archivehour/pip/i7o6j/ and click the listen again button. It's only up for seven days after the broadcast date. Thanks for the link, I think I'm having a problem with my Real Player since my player is still a cute, little and ancient one. I think I'll have to install the recent player though, together with its tons of things I don't normally use. I'll try with the "Real Player Alternative" first. Edi Zubovic, Crikvenica, Croatia |
#16
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Don Pearce wrote:
Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk |
#17
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Adrian Tuddenham wrote:
Don Pearce wrote: Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. d |
#18
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Don Pearce wrote:
Adrian Tuddenham wrote: Don Pearce wrote: Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. I think you're right. I wonder where the mistake occurred and why it wasn't spotted before transmission? -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk |
#19
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
On Sun, 03 Aug 2008 19:39:41 +0100, Don Pearce
wrote: -------------------8----------------------------- You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. -- I just downloaded a Gerzon's article about Blumlein's shuffling techniques ("Applications of Blumlein Shuffling to Stereo Microphone Techniques", M A Gerzon, AES paper 3448). An interesting technique which I think Gerzon implemented into Waves' S1 Shuffler. Inverting the right channel and summing it up (to see whether it was mono compoatible, the stereo improved indeed), I've found that there are some short cancellations similar to short dropouts. So yes, it might be a shuffling stereo experiment but gone bummer because of too a strong stereo information. Just a guess. Where is our Scott, he would certainly shed more light on this? Edi Zubovic, Crikvenica, Croatia |
#20
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Adrian Tuddenham wrote:
Don Pearce wrote: Adrian Tuddenham wrote: Don Pearce wrote: Edi Zubovic wrote: On Sat, 02 Aug 2008 07:59:38 +0100, Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein, and apparently has a load of his original recordings. Here's a sample of a stereo test he did in the 1930s - I just grabbed it off the trailer. There would have been more but Audition is really slow to fire up when you want it in a hurry. http://81.174.169.10/odds/blumlein.mp3 d Thank you, I'd wish you had more of that. These are interesting stereo recordings to investigate. Try to invert the right channel and sum up into mono, you'll get some interesting cancellarions. Edi Zubovicc, Crikvenica, Croatia You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. I think you're right. I wonder where the mistake occurred and why it wasn't spotted before transmission? Maybe they just expected nothing better than they got, and failed to pursue it. They would have had a pleasant surprise had they done so. d |
#21
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Edi Zubovic wrote:
On Sun, 03 Aug 2008 19:39:41 +0100, Don Pearce wrote: -------------------8----------------------------- You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. -- I just downloaded a Gerzon's article about Blumlein's shuffling techniques ("Applications of Blumlein Shuffling to Stereo Microphone Techniques", M A Gerzon, AES paper 3448). An interesting technique which I think Gerzon implemented into Waves' S1 Shuffler. Inverting the right channel and summing it up (to see whether it was mono compoatible, the stereo improved indeed), I've found that there are some short cancellations similar to short dropouts. So yes, it might be a shuffling stereo experiment but gone bummer because of too a strong stereo information. Just a guess. Where is our Scott, he would certainly shed more light on this? Edi Zubovic, Crikvenica, Croatia I started this thread crossposted into r.a.tech. Shame someone cut that out at some point. d |
#22
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Alan Blumlein on radio tonight
On Aug 2, 4:16 pm, "John B"
wrote: Go hehttp://www.bbc.co.uk/radio4/archivehour/pip/i7o6j/ and click the listen again button. It's only up for seven days after the broadcast date. -- John B when I follow this link I get a small window with a BBC "no clip" message - is anyone else able to listen to this item? |
#23
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
miniminim wrote:
On Aug 2, 4:16 pm, "John B" wrote: Go hehttp://www.bbc.co.uk/radio4/archivehour/pip/i7o6j/ and click the listen again button. It's only up for seven days after the broadcast date. -- John B when I follow this link I get a small window with a BBC "no clip" message - is anyone else able to listen to this item? That'll be because you're in Canada, maybe? Try through a British proxy, iPlayer is region locked according to your IP address. -- Tciao for Now! John. |
#24
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Alan Blumlein on radio tonight
On Aug 5, 5:16*am, John Williamson
wrote: miniminim wrote: On Aug 2, 4:16 pm, "John B" wrote: Go hehttp://www.bbc.co.uk/radio4/archivehour/pip/i7o6j/ and click the listen again button. It's only up for seven days after the broadcast date. -- John B when I follow this link I get a small window with a BBC "no clip" message - is anyone else able to listen to this item? That'll be because you're in Canada, maybe? Try through a British proxy, iPlayer is region locked according to your IP address. -- Tciao for Now! John. I think the hour long broadcast was 1.2g,which is crazy, and no steaming service was available.This is where our Australian Broadcasting Corporation really shines...streaming on all audio and video. |
#25
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Don Pearce wrote:
Adrian Tuddenham wrote: Don Pearce wrote: Adrian Tuddenham wrote: Don Pearce wrote: Edi Zubovic wrote: [...] You know what? I get a much more stable set of images having inverted one channel. I wonder if he got the polarity wrong all those years ago. Or maybe something has happened to it since. See the pictures of his cutterhead... http://www.doramusic.com/Binaural%20...%20head%20side %20view.JPG http://www.doramusic.com/Binaural%20...%20head%20deta il.JPG ....he got the polarity right, his recordings used lateral and vertical modulation for the two channels. What has happened since is that the BBC has incorrectly played the recordings in 45/45 stereo. One of Blumlein's original recordings of the Abbey Road stereo tests was available as a vinyl re-pressing on the 'Symposium' label (Nr: 1028A). A vector analysis of it only shows strong modulation on one diagonal, the other diagonal contains a very faint and distorted signal. Some of Blumlein's tests were performed with spaced omni mics (HB1s?) and the spacing was varied from zero to various widths, so it seems possible that this is the test recording made with zero spacing - unfortunately it was the only one re-issued (although metalwork for the others still exists). Not sure - assuming the 45/45 idea is what has happened, I've done the necessary sum and difference edit to get vertical and horizontal. The stereo effect disappears entirely, leaving just a rather shaky central source. Inverting one channel gives a very clear sound stage with the players distributed evenly across it. So I think they did do a conversion from V/H, but got it wrong, ending up with one inverted channel. I think you're right. I wonder where the mistake occurred and why it wasn't spotted before transmission? Maybe they just expected nothing better than they got, and failed to pursue it. They would have had a pleasant surprise had they done so. I have written to the producer of the programme and pointed out the error. If he replies, I will let you know what explanation he offers. -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk |
#26
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Alan Blumlein on radio tonight
Adrian Tuddenham wrote:
Maybe they just expected nothing better than they got, and failed to pursue it. They would have had a pleasant surprise had they done so. I have written to the producer of the programme and pointed out the error. If he replies, I will let you know what explanation he offers. Yes, please do. If it had been something peripheral it wouldn't have mattered, but this stuff was kind of central to the theme. d |
#27
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Alan Blumlein on radio tonight
Don Pearce wrote:
Adrian Tuddenham wrote: Maybe they just expected nothing better than they got, and failed to pursue it. They would have had a pleasant surprise had they done so. I have written to the producer of the programme and pointed out the error. If he replies, I will let you know what explanation he offers. Yes, please do. If it had been something peripheral it wouldn't have mattered, but this stuff was kind of central to the theme. The presenter of the programme, Martin Shankleman, has just telephoned me to discuss the problem. It seems that the transcription engineer for those sections was Roger Beardsley, who supplied them on CD, ready to go straight into the programme. The producer is currently on holiday, so Martin Shankleman is unable to check exactly what happened, but he can remember a discussion which involved the poor results which the recording appeared to be giving in mono. They had obviously suspected that something was amiss, but for some reason did not correct it. When the producer returns, we may get a better insight into what went wrong. -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk |
#28
Posted to rec.audio.pro
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Alan Blumlein on radio tonight
Adrian Tuddenham wrote:
Don Pearce wrote: Adrian Tuddenham wrote: Maybe they just expected nothing better than they got, and failed to pursue it. They would have had a pleasant surprise had they done so. I have written to the producer of the programme and pointed out the error. If he replies, I will let you know what explanation he offers. Yes, please do. If it had been something peripheral it wouldn't have mattered, but this stuff was kind of central to the theme. The presenter of the programme, Martin Shankleman, has just telephoned me to discuss the problem. It seems that the transcription engineer for those sections was Roger Beardsley, who supplied them on CD, ready to go straight into the programme. The producer is currently on holiday, so Martin Shankleman is unable to check exactly what happened, but he can remember a discussion which involved the poor results which the recording appeared to be giving in mono. They had obviously suspected that something was amiss, but for some reason did not correct it. When the producer returns, we may get a better insight into what went wrong. Oops, that really makes it worse. If they had simply not known something was wrong, that is poor, but for something so simply identified and corrected to have been evident to them, and they still failed to put it right is pretty much unforgivable. d |
#29
Posted to rec.audio.pro,rec.audio.tubes,aus.hi-fi,alt.sex.lesbian
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Alan Blumlein on radio tonight
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#30
Posted to rec.audio.pro,rec.audio.tech
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Alan Blumlein on radio tonight
Don Pearce wrote: BBC Radio4's Archive Hour tonight at 8pm (UK) is all about Alan Blumlein And for a sec I thought he must have come back from the dead ! Bad luck with that H2S testing and low cloud for sure. You might have thought they'd use the H2S to avoid the hills. Graham |
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