Nasty slap echo

First reflection point panels deal with a specific issue and not with the general acoustics of the space. The slap-echo is due to the reflections from one hard parallel surface to another. Do you have a lot of hard, bare wall surfaces?

The echo you hear when clapping your hands is harmful to the sound. This can be cured with room treatment, furniture, window treatment, etc. It is best if you can cure the problem with furniture and window treatment. Whenever you add one of these items to the room continue to walk around the room clapping your hands until the room settles down. Be careful not to over do it. Too much can be worse than too little.

For the best cure for this problem, check out Michael Green's "Room Tunes" products. They will remove the slap echo without overdamping the sound. Simple small pillows you can affix to the wall to ceiling area with pins or tape. A combination of absorbtion and diffusion. Don't underestimate these things by looking at their appearance, they really work right.

Yep add natural room furnishings little by little (cushioned furniture, rugs, window coverings, decorative items, etc. to absorb sound until echoing is under control enough for things to sound good.

I have always the room was on the borderline of being overdamped. That is why i am scratching my head to this echo. Sounds like a "ping" that last for 1/2 second. Mainly at the front of the room. Will try to post some pics later tonight.