- Aug 15, 2020
- Southampton, UK
YesThe precedence effect is not an effect that you can be without . Its a reality in how the brain selects sound. But maybe that was what you ment ?
That is what stereo to surround processing tries to do but you are talking about ambience, which only exists in classical recordings that are recoded live. I have clearly said that I am not talking about them. The 99.99% of recordings on the market are recorded with close mikes to multi-track recorders where tracks are recoded at different times. There is no ambience on any of them!The walls can be used as an ”effect” in 2 channel reproduction where 20 ms delayed reflections, both in purist 2 channel recordings in a real concert hall and at home when listening in a big room, can fill up the flawed stereo-system and making the illusion somewhat bigger. This is ofcourse an effect , desired or not.
”The precedence effect can be employed to increase the perception of ambience during the playback of stereo recordings. If two speakers are placed to the left and right of the listener (in addition to the main speakers), and fed with the program material delayed by 10 to 20 milliseconds, the random-phase ambience components of the sound will become sufficiently decorrelated that they cannot be localized. This effectively extracts the recording's existing ambience, while leaving its foreground "direct" sounds still appearing to come from the front.