Home |
Search |
Today's Posts |
#1
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
Quite often, when discussing a stereo mike setup, there is reference to the
stereo angle. Just what is the definition of the stereo angle, and how is it defined mathematically? Thanks, Norm Strong |
#2
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
On Aug 1, 12:29 pm, wrote:
Quite often, when discussing a stereo mike setup, there is reference to the stereo angle. Just what is the definition of the stereo angle, and how is it defined mathematically? Thanks, Norm Strong Hey Norm... This is off the top of my head and it's been a while since the 'books' BUT I believe you may be looking at one of three numbers depending on what question you are truly trying to answer... so here are my takes.... 1. stereo angle of a 'co-incident pair' of mics.... 90 degrees (mic diaphrams nearly touching but perpendicular to eachother while capsules remain on the same plane... you can find illustrations of this online) 2. in an ORTF position... think like you're placing your microphones like your ears work spaced about 8'' apart (17 cm??) and the stereo angle is 110 degrees I believe... (look up ORTF I'm sure its on the web) and 3. (this has nothing to do with mic'ing... ) I suppose you could be talking about proper stereo placement for nearfield monitors??? which generally speaking is a equilateral triangle with your HEAD being the third 'point' of your triangle... (technically that would be 60 degree inner angles of a equilateral triangle) hope this is what you were looking for... take care Norm. Troy Bourne |
#3
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
"Soundhaspriority" wrote in message ... wrote in message . .. Quite often, when discussing a stereo mike setup, there is reference to the stereo angle. Just what is the definition of the stereo angle, and how is it defined mathematically? Thanks, Norm Strong Norm, this higly regarded paper gives it all to you: http://www.rycote.com/products/pdf/T...nic%20Zoom.pdf Regards, Bob Morein Dresher, PA (215) 646-4894 Perfect! Thank you, Bob Norm |
#4
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
Norm, I assume you mean what Prof. Michael Williams calls the
"stereophonic recording angle" of a microphone setup. This is the angle in the real-world recording situation which will just--more or less exactly--seem to fill the span between two loudspeakers in playback. This angle varies considerably among different stereo microphone arrangements. The ideal is to find a combination of miking distance and (by selection of an appropriate setup) stereophonic recording angle which will translate the actual angular width of whatever you're recording into the angular width that you want in playback. That doesn't mean that you always want to fill the distance between the speakers completely. "The violin that ate New York" can be a rather distracting effect, but it is also sad when most of the direct sound sources in a recording seem to come from within a small range of angles near to the center, as so often occurs when X/Y cardioids are used by those who believe that 90 degrees is the ideal angle to set between them. (It actually gives some enormously wide stereophonic recording angle; the result is halfway between stereo and mono.) At any rate, Williams' (and others') work can greatly reduce the amount of trial and error that are needed when deciding on a microphone setup for most simple stereo recording techniques. Once you learn how to use his charts, they offer the big, previously missing pieces of information for a lot of people. Highly recommended. --best regards |
#5
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
"David Satz" wrote in message ups.com... Norm, I assume you mean what Prof. Michael Williams calls the "stereophonic recording angle" of a microphone setup. This is the angle in the real-world recording situation which will just--more or less exactly--seem to fill the span between two loudspeakers in playback. This angle varies considerably among different stereo microphone arrangements. The ideal is to find a combination of miking distance and (by selection of an appropriate setup) stereophonic recording angle which will translate the actual angular width of whatever you're recording into the angular width that you want in playback. That doesn't mean that you always want to fill the distance between the speakers completely. "The violin that ate New York" can be a rather distracting effect, but it is also sad when most of the direct sound sources in a recording seem to come from within a small range of angles near to the center, as so often occurs when X/Y cardioids are used by those who believe that 90 degrees is the ideal angle to set between them. (It actually gives some enormously wide stereophonic recording angle; the result is halfway between stereo and mono.) At any rate, Williams' (and others') work can greatly reduce the amount of trial and error that are needed when deciding on a microphone setup for most simple stereo recording techniques. Once you learn how to use his charts, they offer the big, previously missing pieces of information for a lot of people. Highly recommended. It's an excellent article, and it answers all my questions more than adequately. I read an article by Bruce Babbit not too long ago in which he shows experimental results of the apparent separation of 5 sound sources compared to the actual separation of the same sources when recorded. I guess the object is to make the recording sound as much like the original as possible. It's interesting to note than the best results were obtained with an ORTF placement having an angle of 110 degrees and a spacing of 17cm. Also, the Sennheiser brochure for the MKH series has a short discussion of stereo angles on the back 2 pages. Thanks for your help. Norm |
#6
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
wrote in message
. .. It's an excellent article, and it answers all my questions more than adequately. I read an article by Bruce Babbit not too long ago in which he shows experimental results of the apparent separation of 5 sound sources compared to the actual separation of the same sources when recorded. I guess the object is to make the recording sound as much like the original as possible. It's interesting to note than the best results were obtained with an ORTF placement having an angle of 110 degrees and a spacing of 17cm. Gee, the AES ran a similar article in the 1970s. I don't think it was by Babbit but I could be wrong. Anyway, that one gave good marks to the ORTF setup, also Blumlein (stacked figure-8s at 90 degrees). Peace, Paul |
#7
Posted to rec.audio.pro
|
|||
|
|||
What is the "stereo angle'?
"Paul Stamler" wrote in message ... wrote in message . .. It's an excellent article, and it answers all my questions more than adequately. I read an article by Bruce Babbit not too long ago in which he shows experimental results of the apparent separation of 5 sound sources compared to the actual separation of the same sources when recorded. I guess the object is to make the recording sound as much like the original as possible. It's interesting to note than the best results were obtained with an ORTF placement having an angle of 110 degrees and a spacing of 17cm. Gee, the AES ran a similar article in the 1970s. I don't think it was by Babbit but I could be wrong. Anyway, that one gave good marks to the ORTF setup, also Blumlein (stacked figure-8s at 90 degrees). Peace, Paul I screwed up the name. It was Bruce _Bartlett_, not babbit. And it was in db magazine for December, 1979. (I guess I should have looked it up before I posted.) :-) Norm |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Amp on 110º angle = fail? | Car Audio |