Where is that formula for calculating standing wave frequencies?

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Sennheiser

Sennheiser

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I saw this posted here somewhere but I must not be entering the right keyword in the serch engine.

I have a related question.

How can I interpolate a room that is rectangular for the most part, but with a small computer alcove. Also with uneven dimensions on one wall.

What I mean is, is that on one side of the room the wall does not go straight across. It has a couple of short 90 degree angles. This is also the same side of the room that the computer alcove is on. Perpendicular to the monitors.

What effect does large hardwood furniture pieces have when placed on the opposite side of the monitors? I know that it will scatter the waves, but is there any reasonable way to incorporate this into the equation without a PhD in acoustics or theoretical physics???
 
You were probably thinking about Room Tune (courtesy of Knightfly). Check the links at this thread https://homerecording.com/bbs/showthread.php?postid=474000#post474000
I don't think you'll find a formula, program, etc for analyzing an odd shaped room.

I just changed my control room drawing. It was rectangular but now has six sides. It still has a substantial amount of parallel surfaces. I'll be fine tuning the distances between these surfaces before the walls go up. The back wall (behind mix position) will be treated along with a large overstuffed couch. I guess I could place the two side walls at a slight angle to each other to "defeat" the standing waves. I'll probably need either bass traps or slot resonators in the two back corners. Will this madness never end????

All in all, I'll do what I can then season to taste (err, ear that is).

DD
 
Thanks Don. I'll take a look at that thread.

I have a rather large bookcase with a large collection, packed actually, of hardbound books about 10' behind the mix position. Overall the room from the monitor position to the bookcase wall is about 14+'.

I know from reading that uneven wall surfaces be they absorbant or not will help in the dispersal of standing waves even if they are bouncing around a bit. The back wall also has a small table on the other side of the bookcase and a rifle cabinet on the other side. They are all spaced out with about a foot of room between each. Floor is carpeted and the room has hardwood paneling with a lot of photos, memorabilia, and military awards hung on it.

I will be receiving a TASCAM 38-8 and a bunch of other stuff by Wednesday of this week which is a BIG upgrade for me and I was concerned (for the first time) about the room I would be tracking and mixing in.

At this time I have no choice but to use the same room for both.
There is no room to expand at the present time. Maybe five years from now.
 
Hey Senny - On the subject of the bookcase, best thing short of the (really) spendy option of RPG or similar diffusors. One thing you might want to do is get an audio generator, or an analog synth that can do sweeps, and set up your system at about 6 dB above where you will EVER leave it, and sweep the audio input from 20-20k slowly, listening for any buzzes or rattles. Depending on the bookshelf, a lot of them have really thin backs that can rattle a lot. You'll be amazed at the things in your room that rattle, given enough excitation.

As far as the Tascam 38 goes, you'll be lovin' that sound. I have one, and even with 36+ digital tracks I still use the analog for "that" sound.

I have yet to see any SW that will "predict" a room that isn't a rectangle. For small changes, you can pretty safely ignore them - if the general shape of the room is a rectangle, those dimensions will be responsible for most of the colorations that need taming.

The directions with RoomTune are pretty basic, (I wrote it about 12 years ago) so don't hesitate to post back if you have any questions. I was going to write something similar to the other one, MODESV2, but fortunately found that one before I spent all the time re-inventing the wheel... Steve
 
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