Hi Everyone,
For what it's worth, I have not found a better solution for panning VSL than the Waves S1. I would like to also reassure people about the CPU hit--it is not a major hit at all.
Ashif mentioned that the S1 is a panner, not a distance simulator. This is very true.
However, one can use the S1 with EQ and reverb to very accurately alter perceived distance.
Sound behaves in very predictable ways. For the purpose of discussion, lets say we are recording a concert marimba.
Imagine yourself standing one meter from the front of the instrument. The image is spectacularly stereo--even such that the low notes appear on your right side and high notes on your left. The sound is rich with low frequencies. The sounds of the mallets striking are like perfect little pearls, each with detail, a full spectral response, and so intimate that you can literally hear the sound of wool against wood in the tone.
Now, imagine yourself standing ten meters from the front of the instrument. The instrument image is now dramatically narrower. It comes from a single point in space. The stereo image that was once all instrument is now a single point of instrument sound, almost monophonic in width, accompanied by a very "stereo" room reflective sound. Because the resonator/bar system is relatively small, it cannot project a bass-content into a large amount of air efficiently, so the amount of bass in the overall spectral balance is less. Also, the friction of the intervening air itself causes the highest frequencies to literally "burn up." The product is heat, which is immediately siphoned off into thin air (entropy, our old pal).
Knowing these things, one can use audio engineering tools to affect distance perception. If I want to make something sound more distant, I will use my available tools to do these things:
1) narrow the stereo image
2) reduce lower frequency content
3) reduce upper frequency detail (carefully)
4) add reflective content appropriate to the desired distance
VSL is an ideal library for this type of engineering manipulation, because its reflective content is VERY diffused and controlled (not to be confused with a dry recording). Because the reflections have been so deliberately recorded and leveled with the direct signal, one can manipulate both the stereo width and EQ of an instrument without also affecting an amount of "air" in the sound and ruining the illusion.
One thing I have learned about Herb and the team is that no decision was made lightly. The level of design sophistication in the imaging of the VSL library is super high. To date, it images better than anything I've heard, not just out of the box, but in wildly varying musical applications.
I hope this helps explain how people can use fairly common tools to really expand the VSL palette, and in doing so, creating intensely personal soundscapes.