How to identify Room Modes by measurement

[Olli]

I am looking for the optimal XO point for Subs. This is why I new to check for Room Modes. Unfortunately my room is totally non standard in its dimensions, so a Calculator W/D/H won’t help. Is there a way to identify Room Modes by measurement, preferably with REW?

 

[MediumRare]

I just found this amazing site with the ability to find all your modes (rectangular room) but also easily draw unusual rooms, hallways, niches, etc.

https://amcoustics.com/tools/amroc?l=17&w=22.75&h=9&ft=true&r60=.6
https://amcoustics.com/tools/amray

What can you knowledgeable folks say about the usefulness of these tools?

 

[RayDunzl]

What can you knowledgeable folks say about the usefulness of these tools?

I can't seem to get

https://amcoustics.com/tools/amray

to do anything.

 

[Hipper]

I can't seem to get

https://amcoustics.com/tools/amray

to do anything.

What I did was draw a shape on the graph. Say you want to draw a rectangle. Find a starting point, left click and hold down whilst drawing a line on the graph. When that line is complete release left click. Then draw the next line.

You can make any shape including angular lines but not circles.

Where you go from there I'm not sure. Click on '?' for more clues.

 

[RayDunzl]

It didn't like Chrome here...

 

[MediumRare]

You might need flash.

Next step, click on speaker to place your subwoofer. Click ear to place the listening position. Then you can select the main reflections or all reflections.

 

[Willem]

Just get a measurement microphone like the UMIK-1 and measure what is really happening. You will likely be horrified.

 

[MediumRare]

Just get a measurement microphone like the UMIK-1 and measure what is really happening. You will likely be horrified.

Sure. This site is handy for finding unexpected reflections for potential treatments.

 

[MediumRare]

Can REW do everything MathAudio Room EQ can do? What are the best room eq products?

 

[ernestcarl]

Just get a measurement microphone like the UMIK-1 and measure what is really happening. You will likely be horrified.

LOL. That was my impression at first, too. The awful truth is hard to accept -- in the first days and weeks -- then you later find yourself saying: "well, it's really not all that bad... maybe we can improve things a bit."

 

[ernestcarl]

Can REW do everything MathAudio Room EQ can do? What are the best room eq products?

Do you mean PC EQ software? Don't know about the best, but you could try Equalizer APO on Windows as a free exercise -- especially if you already have a mic.

 

[pozz]

Room modes (which depend on the room's dimensions) can't be fixed with room EQ, although those with irregular shape as the OP described have less chance of standing waves.

As @Willem said, measure and then adjust as needed.

 

[Purité Audio]

You can reduce the energy of the bass peaks with EQ.
Keith