To kind of add to this thread, moving on from the Analog or digital, surround or stereo divides, I suggest that it is hard to create reality from a few squiggles (Analog or digital, mono, stereo or 7.1). There are a couple of areas that can be improved though...
IMHO, the most obvious difference between live sound and playback is dynamics. Music loses impact without dynamics and detail is less audible too. A very good system in a good room can usually produce timbre so well that it hard to tell the difference tonality (at least not without a direct A/B comparison; instrument versus speaker). Unfortunately most recordings (even some of the best) are compressed ...so even on a good system they often won't sound anything near life-like.
There may be good reasons for mild compression; it is more comfortable to listen to and it limits distortion/speaker damage from nasty high SPL transients. Some soft sounding instruments and some vocals may fair quite ok with compression, but most music/instruments are played to be heard at a distance, such as the piano forte, and in real life these instruments have huge dynamics and one can easily sense the lack of convincing dynamics on a stereo playback.
A good system test for dynamics is Yim-Hok Man "Poems of Thunder" CD (Naxos).....plenty of transients and dynamic range on this one. This recording is one of the more convincing life-like ones; Yim-Hok appears to be playing live, in front of you. The drumming is alternately soft and then loud and the transients will make your heart jump. Totally exhilarating, somewhat deafening and a litle tiring to listen too for anything but brief periods ....just as it would be with Yim Hok and a real drum set brought into your living room, six feet in front of you. This drum recoding comes across without the slightest hint of boominess...nearly all transients.
The second big difference, IMHO, between live sound and playback is the room itself....more often than not our ears are well aware of the room size from the reverberant sound field and this tells us that the orchestra playing from the stereo does not fit or else there is some reverberant sound in the mix that cues us that the real venue was indeed much larger than our living room or, in most cases, we get some combination of the two reverberant fields (confusing/conflicting information).This may explain why we close our eyes when we want to listen critically and why a great mix can make us feel that we are there in a larger room. Surround sound, I suspect, can help to counteract this reverberation problem, but it won't completely eliminate the room. Anyone who is skeptical of our ability to detect spatial clues, needs only walk through a church door to immediately recognize that our hearing is capable of sensing the dimensions and space from the reverberant field. Blind people use this everyday to get around; they sense their surroundings by using a stick tapped on the pavement as well as the reverberation of natural sounds. This phenomenon also allows us to sense when someone has quietly crept up from behind because they alter the reverberant sound from behind us.
BTW: An anechoic chamber makes most people feel nauseous, due to the complete lack of spatial clues to match what is seen with the eyes...the brain struggles to reconcile the conflicting information.
IMHO, the most obvious difference between live sound and playback is dynamics. Music loses impact without dynamics and detail is less audible too. A very good system in a good room can usually produce timbre so well that it hard to tell the difference tonality (at least not without a direct A/B comparison; instrument versus speaker). Unfortunately most recordings (even some of the best) are compressed ...so even on a good system they often won't sound anything near life-like.
There may be good reasons for mild compression; it is more comfortable to listen to and it limits distortion/speaker damage from nasty high SPL transients. Some soft sounding instruments and some vocals may fair quite ok with compression, but most music/instruments are played to be heard at a distance, such as the piano forte, and in real life these instruments have huge dynamics and one can easily sense the lack of convincing dynamics on a stereo playback.
A good system test for dynamics is Yim-Hok Man "Poems of Thunder" CD (Naxos).....plenty of transients and dynamic range on this one. This recording is one of the more convincing life-like ones; Yim-Hok appears to be playing live, in front of you. The drumming is alternately soft and then loud and the transients will make your heart jump. Totally exhilarating, somewhat deafening and a litle tiring to listen too for anything but brief periods ....just as it would be with Yim Hok and a real drum set brought into your living room, six feet in front of you. This drum recoding comes across without the slightest hint of boominess...nearly all transients.
The second big difference, IMHO, between live sound and playback is the room itself....more often than not our ears are well aware of the room size from the reverberant sound field and this tells us that the orchestra playing from the stereo does not fit or else there is some reverberant sound in the mix that cues us that the real venue was indeed much larger than our living room or, in most cases, we get some combination of the two reverberant fields (confusing/conflicting information).This may explain why we close our eyes when we want to listen critically and why a great mix can make us feel that we are there in a larger room. Surround sound, I suspect, can help to counteract this reverberation problem, but it won't completely eliminate the room. Anyone who is skeptical of our ability to detect spatial clues, needs only walk through a church door to immediately recognize that our hearing is capable of sensing the dimensions and space from the reverberant field. Blind people use this everyday to get around; they sense their surroundings by using a stick tapped on the pavement as well as the reverberation of natural sounds. This phenomenon also allows us to sense when someone has quietly crept up from behind because they alter the reverberant sound from behind us.
BTW: An anechoic chamber makes most people feel nauseous, due to the complete lack of spatial clues to match what is seen with the eyes...the brain struggles to reconcile the conflicting information.