*free* software to help determine your first reflection points - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 256 Old 03-21-2007, 01:05 PM
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Wow!!!!

Got it working.....veeeeery slick


Thanks
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post #32 of 256 Old 03-21-2007, 01:09 PM
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Well, I think you just won Forum Member of the Month. Nice work!

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post #33 of 256 Old 03-21-2007, 04:29 PM
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Quote:
Originally Posted by jeffreylebowski View Post

Nope. If you're talking about the reflection points being higher because the speaker is above the screen, you are correct, but both the mirror test and this tool take that into account. However the rotation won't give you problems.


Maybe I'm obtuse, but I still don't see how that would be correct. What if the speakers were pointing straight down? The reflection point certainly wouldn't be on the wall somewhere between the speaker and the seat. Obviously that's an exaggeration, but if the speakers are angled down at all, the path that the sound would travel would be different than if the speakers were pointed straight ahead. The different sound path would mean a different reflection point, wouldn't it?

"The dream never dies, just the dreamer."

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post #34 of 256 Old 03-21-2007, 05:12 PM - Thread Starter
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Quote:
Originally Posted by Stew4msu View Post

Maybe I'm obtuse, but I still don't see how that would be correct. What if the speakers were pointing straight down? The reflection point certainly wouldn't be on the wall somewhere between the speaker and the seat. Obviously that's an exaggeration, but if the speakers are angled down at all, the path that the sound would travel would be different than if the speakers were pointed straight ahead. The different sound path would mean a different reflection point, wouldn't it?

Hi Stew4msu.

I think maybe the key point is that the sound is not fired in a straight line off the front of the speaker. It is simulated heading out in thousands of different directions, randomly chosen in a very wide cone coming off the face of the speaker (currently 80 degrees in the program). In this diagram, sound is simulated coming out in every direction inside the arc bounded in white. If you were to rotate the speaker, as long as the yellow raytracing line coming off the speaker stays inside the white perimeter line on the arc (next to the 'a' in theta), the reflection point will still be detected. In this diagram I whipped up, the angle theta > 50 degrees, so you could rotate the speaker in or down that amount and still detect the proper reflection points.



The equivalent in the mirror test would be to say as long as you can still see a sliver of the front face of the speaker in the mirror, you would consider that a possible reflection point. If you rotate the speaker past that, you will miss reflection points.
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post #35 of 256 Old 03-21-2007, 05:32 PM
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OK, that makes sense, thank you.

"The dream never dies, just the dreamer."

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post #36 of 256 Old 03-21-2007, 05:35 PM
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Jeff, this program is amazing!!!

I nominate you for the Nobel Peace Prize.




Mods, sticky this thread!
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post #37 of 256 Old 03-21-2007, 05:41 PM
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anyone else notice a constant humming background noise while running this program? If I change to a different program or minimize the program, the noise will go away. maybe it is just my cheap built-in sound card?
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post #38 of 256 Old 03-21-2007, 09:50 PM
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Great tool! Thanks for the time and effort. Works great.

I have one suggestion that would be useful for my room (and maybe others?) - the ability to model a cathedral ceiling.

Cheers,

Curt
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post #39 of 256 Old 03-21-2007, 11:06 PM
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Great program, thanks
I'm playing around with modeling my room, and I have a question that may or may not go here.

I don't have the space to put my speakers behind my screen, and there is a soffit full of ductwork above the screen, so my center channel has to be below (about 18" off the ground). Am I better off putting my L/R at the same height of the center of the screen, or the height of the C, or somewhere in between (which is what i'm leaning towards)
I only have one row of seating so theres no worries about the people in the back row.
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post #40 of 256 Old 03-22-2007, 05:21 PM
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Quote:


I don't have Vista, but as far as I know it won't work

Confirmed. Using Vista Home Premium with DX10 and it does not work.

Used another PC with XP Pro and worked like a charm. Great program!
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post #41 of 256 Old 03-22-2007, 07:34 PM - Thread Starter
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New version 1.02 is now posted guys. Changes are in post #1.

I don't plan on posting a new version every day, but when important bugs are found - especially ones that cause "illegal operations", i'll push out an updated version ASAP. Thanks to ecrabb for finding an "illegal operation" crash that is now fixed in v1.02. There is also some added functionality described in post #1.
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post #42 of 256 Old 03-22-2007, 07:39 PM - Thread Starter
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jspeillman,

Thanks for the info on Vista. I'll post a DX10 version shortly after I get Vista since the port will be easy.

mbennum,

Thanks! As to your question, i'm honestly not sure. Some forum searches may turn up results.

Curt3g,

Thanks! I'll add cathedral ceiling to the list of feature requests.


ps. Does anyone know how I can modify the thread title? I'd like to update the current version info in there too if possible.
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post #43 of 256 Old 03-22-2007, 07:57 PM
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I know its me, but what do you need to get this program running?? I downloaded the file from the first page and it want another program to run it??

What do I need to run it. I did install DirectX 9.0c
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post #44 of 256 Old 03-22-2007, 08:09 PM - Thread Starter
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Quote:
Originally Posted by ccapozzoli View Post

I know its me, but what do you need to get this program running?? I downloaded the file from the first page and it want another program to run it??

What do I need to run it. I did install DirectX 9.0c

Hi ccapozzoli. What error do you get when you try to run it?
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post #45 of 256 Old 03-22-2007, 09:54 PM
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Thanks for the update. Also an e-mail address for paypal donations would be appreciated. Thanks
-Andrew
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post #46 of 256 Old 03-23-2007, 09:26 AM - Thread Starter
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Hi vipercompany. Thanks! Paypal email is [email protected].
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post #47 of 256 Old 03-23-2007, 09:43 AM
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Quote:
Originally Posted by richardyc View Post

anyone else notice a constant humming background noise while running this program? If I change to a different program or minimize the program, the noise will go away. maybe it is just my cheap built-in sound card?

Are you sitting at a first reflection point when using the software?
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post #48 of 256 Old 03-23-2007, 03:53 PM - Thread Starter
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Thanks to vipercompany for his donation!
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post #49 of 256 Old 03-25-2007, 12:25 PM - Thread Starter
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If there are any other requests for certain features in the room geometry (such as the ability to use cathedral ceilings), please let me know in the next 24 hours, as I will be reworking this part of the code over the next few days.
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post #50 of 256 Old 03-25-2007, 01:12 PM
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How about a zip archive for download, in addition to an rar?

- Terry

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Home Theater Acoustics
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post #51 of 256 Old 03-25-2007, 03:16 PM - Thread Starter
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Quote:
Originally Posted by Terry Montlick View Post

How about a zip archive for download, in addition to an rar?

- Terry

Hi Terry. Zip archive has been added as a download option in the first post.
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post #52 of 256 Old 03-25-2007, 11:01 PM
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What size room does this program support? Mine is 24'x24' with cathedral style ceiling 15' at highest point

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post #53 of 256 Old 03-25-2007, 11:27 PM
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Another thought on cathedral ceilings. I'm not sure if folks have builds with them running either parallel or perpendicular to the screen wall.

Regards,

Curt
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post #54 of 256 Old 03-26-2007, 12:39 AM - Thread Starter
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Hi Gino. The program in the current form supports rooms larger than 24'x24'. Cathedral ceilings will be added in the next release.

Thx Curt3g, i'll make sure you can choose the axis for the cathedral ceiling.
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post #55 of 256 Old 03-27-2007, 03:27 AM
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jeffreylebowski,

Brilliant work!!!

Quick suggestion, would it be possible to have an option to convert the room measurements to metric?

Cheers,

Simon
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post #56 of 256 Old 03-27-2007, 05:01 PM
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good app
one suggestion, instead of slider, maybe a txtbox for users to enter the dimensions manually.

thanks
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post #57 of 256 Old 03-27-2007, 06:39 PM
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program is awesome...just wondering if in the next release or so, i can import a wall layout from sketchup or sumthin...i have a part of my room that is like a bay window shape. Or if you will have more options for room shapeand also to be able to rotate speakers too...once again, thx...works great!



is it good to have a small group, or wide group?
LL
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post #58 of 256 Old 03-27-2007, 10:07 PM - Thread Starter
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Quote:
Originally Posted by timmy_mpls View Post

program is awesome...just wondering if in the next release or so, i can import a wall layout from sketchup or sumthin...i have a part of my room that is like a bay window shape. Or if you will have more options for room shapeand also to be able to rotate speakers too...once again, thx...works great!



is it good to have a small group, or wide group?

Hi Timmy. We've already had the discussion about rotating speakers and the fact is rotation doesn't make much of a difference when it comes to reflection points since the app casts such a wide cone off each speaker anyway.

Re small group or wide group...if you mean listener zones, the smaller the better. The smaller you make the green boxes, the less sound will reflect off the walls and hit them, resulting in smaller clusters of points, so you get to make less panels!

As for the past few posts about feature requests, I will consider all of them for future releases, but for the next version, which will be 1.1, I have now locked in the features that will be available. They include:

1. Cathedral Ceilings
2. Ability to setup speakers off-center in the room x-axis
3. Ability to setup listener zones off-center in the room x-axis
4. Ability to selectively disable listener zones
5. GUI redesigned to support these features
6. Sound now passes through listeners to back wall and reflects, resulting in
more reflections shown on back wall. Before I was assuming the green boxes intercepted all sound fired at them, which won't strictly be the case unless you're a family of fatheads.

behind the scenes improvements:
Raytracer now 2x faster than v1.02. Default scene on my machine is < 5 seconds. Can't make it much faster.
GUI drawing code is 3x faster
CPU utilization down 15% on my machine

I'm not sure when this release will be since I will be away most of the next month, and I am only about 1/2 done the modifications, but i'll do what I can.
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post #59 of 256 Old 03-27-2007, 10:25 PM
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Great!! Thanks for the info on the upcoming release. Looking forward to it
-Andrew
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post #60 of 256 Old 03-28-2007, 02:31 AM
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jeffreylebowski,
I really appreciate your program !!!

Would be really great if you integrate also the choice between english and metric system, all europen user will really appreciate that !

thanks
Emanuele
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