I have that album, and have played it via both SQ and QS decoding. As for Nimbus, I thought they ceased operation. I do have a DVD-Audio disc from them that is supposedly a discrete recording, derived from the output of an Ambisonic decoder playing a UHJ-encoded master. It's not bad, but classical music, even discrete, didn't offer high amounts of directionality in rear ambiance. So it didn't really offer more than a QS or SQ encoding.
