Nasty slap echo

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.

here are some pics of the room....[IMG]http://i972.photobucket.com/albums/ae206/streetdaddy/DSC_2500.jpg[/IMG]

[IMG]http://i972.photobucket.com/albums/ae206/streetdaddy/DSC_2497.jpg[/IMG]

not sure why photobucket not working here?

Funny you say that. I was just revisiting Ethan's site. I have 2 mini traps in each corner behind the curtains, and 2 minitraps leaned against the wall behind the rack. Another one on the right wall leaned on the wall just past the first reflection point.

I just took down the absorption panels on the side walls. Carpet is wool. I am thinking of making some DIY room tunes and sticking them above the crown molding in the wall ceiling junctions to see if that tames this pinging sound.

Did the pics come through for you?

Here they are again...

http://i972.photobucket.com/albums/ae206/streetdaddy/DSC_2500.jpg

Timrhu,my first cd player was a RA cd50. What a great player...wish i still had it!

Thanks for the help guys. I will try these one at a time when i get a chance and see what helps.
I guess i should have labeled this thread nasty slap "ping". I know when i clap in other rooms i hear an slap echo. This is a different sound altogether. Really weird.
I have a set of first reflection point absorbers from realtraps, but they do nothing for this sound. I removed them a few days ago thinking maybe i had my room overdamped.

May try to get some insulation and make some DIY rolls to set on top of the crown molding. Does it matter what R value? What have you guys used to roll them up in? Some kind of black fabric would work best visually. I could have my wife sew some tubes and stuff them, i guess.

Thanks for the picture links. Hard to really hear it when music is playing. My wife is off today so i will have her clap at the speaker locations and see how bad it is in the sweet spot.
When i walk around the front part of the room clapping my hands it is really bad...clap.ping...clap..ping.

Has anybody ever made some DIY "room Tunes" using Owens Corning 703? I was thinking of picking some up and sticking it in the corners and maybe ceiling wall junction points.