Why organ music

I have a nice ss - CD set up that satisfies me most of the time, but am re-tasting LP's. The one kind if music that always sounds much better to me on LP, even with my very modest LP system is organ music. I used to play organ myself. But I also play piano and can relish well recorded piano on CD. To me, organ on CD is very hard to listen to. Anyone have idea why I notice such a difference with organ versus other instruments?