so sample libraries are made with mics in front of instruments. If you put the mics close to the instruments, like as in inches away, then they will be very dry sounding very little to no room ambience in the sample. As you move the mic further away the sound that is recorded will be different from a distance, and also, some of the room ambience will be recorded into the samples. If you go REALLY far away, you will especially hear a lot of the room ambience.
VI libraries were recorded very close, and I would guess they were probably also processed to be as dry as possible without any room ambience. In order to make it sound like its on a stage in a room, you have to apply reverb and/or using something like MirPro to add the room ambience and stage positioning.
If you use a mic that is further away, like at the front of the stage, then the mic will pick up various early reflections and other sonic clues that will reflect some of the room ambience as well as will pick up stereo field and stage positioning. You can't hear that from the close mics, but from the front of the stage you can hear whether the sound was left or right on the stage, front or back, etc..and some of the reflections off the back wall, etc..room ambience.
If you are using close mic'd samples..then you have to add all of that info artificially using reverb and/or MirPro.
If you record from way back in the room, then you pick up even more room ambience of the entire venue. Again, the close mics don't really pick that up significantly. So if you use close mic samples, you have to add that artificially using reverbs and/or MirPro.
VI libraries basically required MirPro or MirX to truely sound like you are in a room. MirPro has been a perfect companion to VI libraries.
Many libraries provide multiple mic position samples. So you buy the library and you get the samples that were recorded at close distance as well as mics further away., including very far away. My EastWest Hollywood Orch, for example, includes close, mid, main and surround, and there is a mixer I can use to include in the sound any combination of those mic positions in the sound I hear. You can use just one mic, or all of them, mixed any way you want. In this way it picks up the room sound, the stage positioning, the timbre of the instruments, etc..and no artifically reverb is really needed. But if I wanted it to sound like a different venue, then I can't really use all those mics because they sound like the room. Except for the close mics. So I can use only the close mics and then use artificial treatment such as reverb or mirPro to add the stage positioning and room sound...all the stuff that normally would be present in those further away mics.
With Synchornized products, they basically took the close dry mic samples, similar as VI series, and packaged them into the Synchron player, mainly to use a newer player that some feel is easier to use.
With the full synchron products, I guess they include some other mic positions which you can combine together like I do with EWHO without using any artificial reverb, you can hear it as it should hear in that venue..including all the stage positioning and room ambience. If you use those fruther away mics, then the room sound is baked into it. But you don't have to mess around with MirPro either. However, its only one venue. If you want to hear the product through other venus with different room sound, then just use the close mics....and run it through MirPro to use whatever venue you want to get a different room sound.
I don't have any of the full synchron products, so my apologies if I have some details wrong about the exact specifics.
