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In Reply to: Recordings with perfect stereo image? posted by gdecapua@hotmail.com on February 23, 2007 at 23:00:40:
True, some mono recordings will sound exactly the same in both channels and provide a dead center image. However, this depends on the miking technique used during the recording. Don't fall into the "mono" trap to tweak your channel balance. Many mono recordings will present the image left or right of center.
Follow Ups:
...and therefore produce a central image as phase and amplitude is the same. There is no "miking technique". Are you confusing a recording of a single instrument with mono?
If one speaker plays louder than the other the one-point mono center image can be somewhat off center, but there will be no left to right soundstage unless some unusual room reflections distort the typical mono "one-point" image. OF COURSE AN AUDIOPHILE CAN IMAGINE HEARING ALMOST ANYTHING IF HIS BRAIN COOPERATES.
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Richard BassNut Greene
Subjective Audiophile 2007
and the drummer in the middle. Bass player on right, singer towards rear. I can hear that placement on mono recordings played back on stereo speakers. If you can't, then I perhaps you need to listen some more. It's very easy to hear because each band member lays down their contribution at a distinct db level. So, if the guitar player is louder, you should be able note that the sound is NOT from the center.
I emailed you through asylum mail.
.. if you think that you can hear a drummer in the middle and a bass player on the right from a mono recording. Your equipment may be poorly set up in relation to the room so that maybe some room reflections in the bass region give you the impression that the bass is coming from the right. If you check on headphones and still hear stereo from mono then please see an audiologist. A singer to the rear is fine conceptually as mono will provide depth if not width information.However a mono recording correctly produced in a stereo system can ONLY (repeat ONLY) provide a precise central image (albeit with the potential of a sense of depth). Which is why the OP is recommended to use it to check for correct stereo imaging. If the mono signal via a 2 channel system provides a central image of no apparent width then it follows logically that stereo images will be presented in their relative correct positions.I am afraid that everything that you say in your last two sentences has nothing to do with monophonic reproduction.
As you say, room effects are the likely culprit. Poor speaker matching could be another. Even a dirty pot or switch. Could even have dead driver.And don't overlook the human factor. I once spent the better part of an afternoon troubleshooting a misterious ailment: it began as "Gee, the imaging on this record sucks," and went thereafter to "Yikes, what could be screwing up the imaging like this?"
Turned out I had inadvertantly connected my biwired speakers with the left bass and right treble in one speaker and the right bass and left treble in the other. D'oh!
mono = one channel, same in both channels played back in stereo system. The miking can affect the recording process, but it cannot later make two different channels when only one was recorded....
nt
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