All - I think David's discussing the purple that is most evident at the bottom of each of the two images. I believe it is just a matter of noise in the darker regions of the image. It also appears that the wall to the drummer's left may be painted purple, and even though it is rather dark, it may be serving as a bounce light that is also purple. I agree that the top image certainly demonstrates a remarkable dynamic range between the indoor scene and the outdoor area seen through the blinds. I suspect that jacking the exposure up and dropping the WB may correct a lot of what's going on here. Other than that, this is pretty incredible noise control. Maybe just convert the images to B&W?
I looked at the top image in CS6's RAW converter and made a few changes -- WB, brightness, tone, etc., and saved them. The purple is now just as, or more evident, but the other tones are better (I think -- but maybe not. It's DARK in there!).