I hear no difference with my untrained ears. The room is half done in Velvet. The other half is painted dark grey which i dont consider important to do coz the reflections dont reach that far ( that much ) My MLP is 10ft from the screen so everything from the screen till 11ft ( 1ft extra ) is covered in black velvet ( speakers and my dual subs, even my recliners )
I maybe crazy but i always hated reflections on anything whenever i go to someone's theatre to watch a movie. They add a lot of distraction tbh. I even covered the part of recliner with velvet coz when i recline back that part used to gleam ( under the legs ) even though its black.
A slight degrade in the audio is acceptable to me tbh. But even then i dont hear a degrade with velvet in half the room. I could do all room but i fear the audio might be compromised and with very very slight improvements in video. And its a lot of pain attaching velvet to walls, especially ceiling.
And then you get addicted. Once you go black, you never go back. Every little thing which isnt black will bother you then in your room.
Glad you didn't hear much difference. Then its worth it definitely.
Regarding attaching the velvet to walls. Even I was wondering how difficult it would have been. At the end of the day, when you look at that gorgeous image you forget everything.. Enjoy !
This gives me confidence to try the same in my room when I start. Thanks