Hi All,
I have made a Room Simulator program for PC and Mac in which you can simulate the room response with different loudspeaker placement etc.
With this thread I want to give you this program for you to try out. In fact, I have spent a considerable amount of weekend-time on writing the program, so please try it out and post a comment! 🙂
Some features:
* It is made to simulate rooms with shoe-box geometry.
* Uses the mirror-image method, calculations are fast and accurate.
* Plot the frequency response in one point in the room or plot the average response over an area in the room (corresponding e.g. to a sofa)
* You may simulate any number of speakers, with individual gain and delay.
* Different loudspeaker placements may be compared in the same graph.
* A 3D-graph can be plotted where the sound level at a particular frequency is plotted over the room.
* Advanced feature: simulate both coherent and incoherent loudspeaker sources
Picture (don't get scared by all the buttons... it's easy to use and it actually comes with a manual):
Quick manual with usage tutorials: .pdf
And here are the program files - choose the ones for your platform. You need to install the Matlab Run-time library first before you can start RoomSim.
RoomSim for Windows:
Matlab run-time library for Windows
RoomSim32.exe
RoomSim for OS X:
Matlab run-time library for OS X
RoomSim.app.zip
Updates:
* Beware that the program will take a while to load the first time you start it and you may need to restart your computer after installing the Matlab runtime.
* Screen resolution requirement: 1440*900.
* The font size in your OS needs to be set to normal or small for the program to be displayed correctly
* The program should now work with newer OS X versions (tested on OS X 10.9).
Regards, Viktor
I have made a Room Simulator program for PC and Mac in which you can simulate the room response with different loudspeaker placement etc.
With this thread I want to give you this program for you to try out. In fact, I have spent a considerable amount of weekend-time on writing the program, so please try it out and post a comment! 🙂
Some features:
* It is made to simulate rooms with shoe-box geometry.
* Uses the mirror-image method, calculations are fast and accurate.
* Plot the frequency response in one point in the room or plot the average response over an area in the room (corresponding e.g. to a sofa)
* You may simulate any number of speakers, with individual gain and delay.
* Different loudspeaker placements may be compared in the same graph.
* A 3D-graph can be plotted where the sound level at a particular frequency is plotted over the room.
* Advanced feature: simulate both coherent and incoherent loudspeaker sources
Picture (don't get scared by all the buttons... it's easy to use and it actually comes with a manual):
An externally hosted image should be here but it was not working when we last tested it.
Quick manual with usage tutorials: .pdf
And here are the program files - choose the ones for your platform. You need to install the Matlab Run-time library first before you can start RoomSim.
RoomSim for Windows:
Matlab run-time library for Windows
RoomSim32.exe
RoomSim for OS X:
Matlab run-time library for OS X
RoomSim.app.zip
Updates:
* Beware that the program will take a while to load the first time you start it and you may need to restart your computer after installing the Matlab runtime.
* Screen resolution requirement: 1440*900.
* The font size in your OS needs to be set to normal or small for the program to be displayed correctly
* The program should now work with newer OS X versions (tested on OS X 10.9).
Regards, Viktor
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Thanks Viktor but tha app doesn't start under OS X 10.8.4 although I did install the Matlab runtime.
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Very interesting Viktor.
So it looks like you have allowed for simulating of "pitcher/catcher arrays".
Any thoughts of adding some simple wall absorption coefficients?
What is CABS?
David S.
So it looks like you have allowed for simulating of "pitcher/catcher arrays".
Any thoughts of adding some simple wall absorption coefficients?
What is CABS?
David S.
Hi Markus and thanks for trying the program, sorry to hear that it is not starting on your OS X 10.8 machine. I will see if I can find the reason for that.
David S,
By "pitcher/catcher arrays" I guess you are actually referring to what CABS is:
http://vbn.aau.dk/files/62729248/LF_sound_field_control.pdf
It is a method of using two subwoofers at the front wall and two delayed and inverted subwoofers at the back wall in order to cancel out standing waves in the room, and get perfect bass everywhere. 🙂
The picture in the first post shows a simulation of such a system.
By "pitcher/catcher arrays" I guess you are actually referring to what CABS is:
http://vbn.aau.dk/files/62729248/LF_sound_field_control.pdf
It is a method of using two subwoofers at the front wall and two delayed and inverted subwoofers at the back wall in order to cancel out standing waves in the room, and get perfect bass everywhere. 🙂
The picture in the first post shows a simulation of such a system.
Omnifex,
It does take up a pretty large part of the screen, and I think you will need at least a 1440*900 screen resolution for the program to work correctly.
It does take up a pretty large part of the screen, and I think you will need at least a 1440*900 screen resolution for the program to work correctly.
David S,
Missed your question about wall absorption. 😛 In the program you can adjust a constant frequency independent absorption factor of the walls.
/Viktor
Missed your question about wall absorption. 😛 In the program you can adjust a constant frequency independent absorption factor of the walls.
/Viktor
Hi Viktor,
Good stuff on both accounts. I wasn't aware of the CABS acronym but notice the speakers on opposite walls and provision for delay and inversion. More people should play with this approach.
Adjustable absorption should help with model accuracy. Have you had any luck comparing room predictions to actual?
David
Good stuff on both accounts. I wasn't aware of the CABS acronym but notice the speakers on opposite walls and provision for delay and inversion. More people should play with this approach.
Adjustable absorption should help with model accuracy. Have you had any luck comparing room predictions to actual?
David
Good effort ! I'll check it out for awhile... good timing for me as I am about to build/install a new system at home.
I'll be using a new WIN8 machine.
Thx-RNMarsh
I'll be using a new WIN8 machine.
Thx-RNMarsh
RNMarch,
Did you install the "Matlab run-time library for Windows" that I linked to in my first post? You will need it to start RoomSim, otherwise it will complain that MCR is missing.
David S,
I agree that more people should try CABS. A reason I made the program was that I couldn't find any suitable software to simulate a CABS system. Unfortunately I haven't tried it in practice yet, but flat response in the bass over the whole room sounds like heaven to me. 😎
I haven't tried to compare the simulated responses to real rooms yet either so I'm hoping that we can post some simulations and measurements in this thread.
/Viktor
Did you install the "Matlab run-time library for Windows" that I linked to in my first post? You will need it to start RoomSim, otherwise it will complain that MCR is missing.
David S,
I agree that more people should try CABS. A reason I made the program was that I couldn't find any suitable software to simulate a CABS system. Unfortunately I haven't tried it in practice yet, but flat response in the bass over the whole room sounds like heaven to me. 😎
I haven't tried to compare the simulated responses to real rooms yet either so I'm hoping that we can post some simulations and measurements in this thread.
/Viktor
Have it running under Win 8. No luck with the Mac version. MCR for Mac is 7.14 whereas the Win version installs 7.13?
By the way, the latest REW beta 17 comes with a room simulator too. It has some neat additional features.
By the way, the latest REW beta 17 comes with a room simulator too. It has some neat additional features.
Very interesting! The program uses only omni-directional point sources, correct? So in order to simulate a directional 'speaker', one could simply add multiple point sources close together to form a dipole or cardioid?
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