There are numerous DSP modes that simulate spaces ranging from very intimate to cathedrals. All are very effective. It also has an early Pro Logic decoder which has a setting appropriate for music.
There are other settings, but it’s been so long that I don’t remember the details.I do know that the original unit was upgradable, but I never bothered with them.
The audio salon that sold it to me allowed me to take it home along with the equivalent Yamaha unit of the time. The CP-1’s adjustability and performance was markedly better than the Yamaha, albeit at a price almost 50% higher.
For a while I used two for Quad, one for stereo-ambiance. I still have them.
Very old technology. I don't see how it would sanely fit in a regular mch setup.
The CP-1 and the CP-3/CP-3 Plus are great for someone that wants stereo plus ambiance (a great thing!) fully in the analog domain. I would love to give away my CP-3s Plus to good homes where they will be used as intended, not just as a stereo preamps (they are in Colombia BTW).