(I can't figure out in which forum to ask questions of a more "audio-theretic" nature)
Suppose you came across a truly awesome speaker but only ONE. How can existing 2-channel music best be played, using the ONE plus support speakers, ASP/DSP/etc.? Any simple circuits to extrapolate L/C/R 3-channel out of 2-channel?
"How to convert 2-channel audio to 5.1 surround sound" seems to be a Frequently Asked "hook-up" Question (one can then use the ONE as Center), but I'm interested in both the theory of it, and actually listening to high-fidelity 3D sound without first remixing manually.
Surely everyone has had this "necessity" at some point.
Suppose you came across a truly awesome speaker but only ONE. How can existing 2-channel music best be played, using the ONE plus support speakers, ASP/DSP/etc.? Any simple circuits to extrapolate L/C/R 3-channel out of 2-channel?
"How to convert 2-channel audio to 5.1 surround sound" seems to be a Frequently Asked "hook-up" Question (one can then use the ONE as Center), but I'm interested in both the theory of it, and actually listening to high-fidelity 3D sound without first remixing manually.
Surely everyone has had this "necessity" at some point.
You combine the two stereo channels into one to drive your center channel amplifier and loudspeaker. This is called monaural. You can then use a stereo amplifier and two lesser loudspeakers as your left and right source. Works even better if you have a delay on the stereo pair. (15 mS). The delay may be created by sitting in the center and spreading out the stereo pair. If the room is not wide enough, then the center loudspeaker may be brought forward a few feet.
This is done in some theatre systems.
This is done in some theatre systems.
How difficult it is depends on how well you want to do it. Creating true left/center/right signals is typically more complicated than it might appear at first glance. But there are ways to do it at a basic level also.
Upmixing is another term that's often used for deriving a center channel signal from stereo. It's not typically part of cheaper pre-packaged DSP units.
Some of these links are just basic discussions, some talk about specific products, and some point to patents that go into more detail.
https://dsp.stackexchange.com/questions/74731/centre-channel-derivation-using-correlation
https://www.audiosciencereview.com/...w-demanding-compared-to-left-and-right.28947/
https://sound-au.com/project18.htm
https://www.stereophile.com/interviews/1204fosgate/index.html
Center channel derivation as been an issue in car audio for a long time, since the typical speaker locations create a "hole in the center".
The Audio Control ESP-3 was one of the early mass market units. The Fosgate Gavotte processors were less common, but around even earlier. There's not as much info about Gavottes though.
https://www.diymobileaudio.com/threads/a-c-esp-3-or-similar-center-channel-processor.159391/
https://www.diymobileaudio.com/thre...ly-process-a-center-channel-correctly.325529/
Upmixing is another term that's often used for deriving a center channel signal from stereo. It's not typically part of cheaper pre-packaged DSP units.
Some of these links are just basic discussions, some talk about specific products, and some point to patents that go into more detail.
https://dsp.stackexchange.com/questions/74731/centre-channel-derivation-using-correlation
https://www.audiosciencereview.com/...w-demanding-compared-to-left-and-right.28947/
https://sound-au.com/project18.htm
https://www.stereophile.com/interviews/1204fosgate/index.html
Center channel derivation as been an issue in car audio for a long time, since the typical speaker locations create a "hole in the center".
The Audio Control ESP-3 was one of the early mass market units. The Fosgate Gavotte processors were less common, but around even earlier. There's not as much info about Gavottes though.
https://www.diymobileaudio.com/threads/a-c-esp-3-or-similar-center-channel-processor.159391/
https://www.diymobileaudio.com/thre...ly-process-a-center-channel-correctly.325529/
Yes, Elias was interested in the Stereolith.
https://www.stereolith.com/en/
https://www.diyaudio.com/community/threads/stereolith-loudspeakers-question.10962/
Note though that it doesn't do anything as far as any form of surround channels.
https://www.stereolith.com/en/
https://www.diyaudio.com/community/threads/stereolith-loudspeakers-question.10962/
Note though that it doesn't do anything as far as any form of surround channels.
Holy cow I hadn't even heard of Stereolith/Blumlein/etc.
p.s. this led down several threads but I can't seem to find a circuit (that looked safe to try)
p.s. this led down several threads but I can't seem to find a circuit (that looked safe to try)
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Well, for sure, I could listen to Stereolith in Switzerland, by Mr Schupbach himself, maybe it was not best speakers in the box, but I confirm 20 years later, it's best way to get some stereo in single box. because of special accoustic algorythm, if I could say, and something maybe Elias himself did not understood, is that you get exactly 17cm between ears, and so there's only one position possible between two speakers in single box. (if you take average distance between mobile emissing part, in fact)
I had my sound recording studies with Mr Igor Kirkwood, in France, so I can tell you, that sound diffusion is absolutely terrefic with stereolith, anywhere you stand around the box, but I would just say that maybe vertical sound position, was not so perfect, but anyone can get several stands, to hear at right vertical level.
I learned to record stereo sound with 17cm spaced mics, (it's called ORTF recording, with 110° angle on card mics), but I could not imagine, it was possible to make single stereo speakers, to get perfect sound you recorded like that.
I had my sound recording studies with Mr Igor Kirkwood, in France, so I can tell you, that sound diffusion is absolutely terrefic with stereolith, anywhere you stand around the box, but I would just say that maybe vertical sound position, was not so perfect, but anyone can get several stands, to hear at right vertical level.
I learned to record stereo sound with 17cm spaced mics, (it's called ORTF recording, with 110° angle on card mics), but I could not imagine, it was possible to make single stereo speakers, to get perfect sound you recorded like that.
