CR Treatment and Tuning---The home stretch!!

Now I did it!..I went and installed all of the deep vertical dividers at 17" from the end instead of 16".

Ooops! Not so good... Let me think about that a bit, and re-do some of the calculations. The main issue here is that the vertical dividers will no longer fall in the center of the slats, as they are supposed to, which de-tunes those slats from where I wanted them to be. The dividers are supposed to line up on the center-line of those slats, but now they'll be offset by an inch, which is a large change. I'll have to run the numbers to see how much the frequencies will be shifted, and if they will still be within the range that I had originally planned. There's a little wiggle room here for slight imperfections, but not much, so let me work through it a bit... However, I won't be able to do that tonight or tomorrow (it's the weekend!), so it will have to be Monday morning before I can get to it. As soon as I can, I'll take a look and let you know if it is still OK or not. - Stuart -

Cool thanks, Worst case I can bust em out and reset them. Keep in mind that I only set the deep ones. Also you may want to look at the model because the dividers in question are on the edge of the slat and the shallow ones are definitely a bit off center. Overall a fix won't be that bad.

Have you seen what I'm talking about in the model? Stuck until we sort that out. I think the divider locations are going to have to be moved if they need to be center line of the slats.

I think the divider locations are going to have to be moved if they need to be center line of the slats.

OK, I did some calculations and checking, and as long as the dividers are not closer than about 4mm to the gap, then we are OK. In other words, there must be at least 4mm between the edge of the slat and the start of the divider. This does re-tune those slats, yes, but the overall change isn't too bad. The tuning is still within the range I am shooting for. - Stuart -

Cool thanks...

Of the places your cat will go! :lol: Back up to speed...Should have the slat project finally done by the end of the weekend!

I'm wondering what type of acoustic response a cat has? :) It seems like the cat is going to be a regular fixture in your studio, so perhaps you should include the "feline frequency factor"? :) :shot: - Stuart -

Gotta have a Sasha cat in the studio! She bolts when the sounds starts so no hope there..lol

Hi Stuart, I keep forgetting to mention the gap issue. Not sure what needs to be done here. Caulking will make a mess against the fabric and can't be done for testing anyway.

I'd suggest gluing a thin, soft rubber strip to the front of the ribs, and screwing the slats into that. It only needs to be about 5 or 6mm thick (about 1/4"). The maximum gap is about 3mm, so with a 6mm strip as long as you can compress it to 3mm, you'd be fine. Maybe the type of weatherstrip rubber you can buy at Home Depot for sealing around doors and windows. - Stuart -

I was thinking about something like that that's a good idea... weatherstripping would be no problem at all.. I'll get back to you in just a bit about your latest update. Looks great at first glance!

Back at ti again. Sorry for the long break! Doing some testing with Stuart to make sure that I have it right before I commit to closing things up. As soon as Stuart verifies the tests, I'll finish this up. Can't wait....

I got the data you sent, Frank! . . . :shock: Just working my way through it.... Stay "tuned" ... :) (sorry I couldn't resist that last comment....) - Stuart -

Good to know. Hopefully the news will be good...moment of truth for me with regards to all the hard work! :) Ha ha... :shot:

Hi Stuart, I emailed you a couple of follow up questions. Thanks

I didn't see any e-mail from the last couple of days, Frank: please send again... Might have been a server glitch... software was updated recently... - Stuart -

Might have gone to your spam folder. It did that to me once on the same email chain. I'll resend.

OK, just about done with this! Should have tests back to you by Wednesday Stuart!

Cool! Looking forward to seeing that! Nice work, by the way... :thu: - Stuart -

OK, Almost got there today, with just some end seal issues to sort out tomorrow before I test. I certainly tried!! :horse: Not quite the right emoji but it fits the feeling I'm having right now....

I have to say, it's looking rather nice! :thu: - Stuart -

I know right??!! Lets hope it works as good as it looks... :lol: A couple of things left to do. Should have some tests back in a couple of hours.....Stay tuned :mrgreen:

Measurements sent!

Cool! I'm out for the evening, but I'll take a look tomorrow, then find something else to keep you busy... :) (Don't want you getting bored, with nothing to build! :) ) - Stuart -