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In Reply to: RE: Adding a tweeter to MMG posted by aceinc on February 23, 2017 at 14:22:15
Aceinc, I'll stay tuned for when you return.
The graphs are from REW (Room EQ Wizard). I've been using it since 2008 to help me shape my Maggies up more objectively. It is a free program that allows measuring a whole lot of useful things. We can talk more about this later but it is invaluable for things like what you have in mind.
Not far, I am in Coral Springs so yes, when the time comes I'd love to.
Follow Ups:
I have been using REW for a number of years as well. I have never used it to do this type of analysis, however.
I used it to set up my subs, mainly.
LOL, that does not surprise me, but at least it makes you familiar enough to explore further. When REW started, it was sheltered in the Home Theater Shack. With folks having headaches adopting subwoofers "properly", REW was a natural resource. Its default settings even came oriented towards this purpose. Along time, it has evolved into a much more ample tool set. Just make sure that you have a recent version. I use the "multiple REW instances" version for Windows.Then, for the reasonable price of a good cup of espresso, of course :) I'll be glad to give you the expanded tour. For now, notice the little camera icon at the upper left corner of some plots? It creates snapshots. Also, you can tell REW to scan at full frequency vs the original default low range.
Edits: 02/23/17
JBen, I have used REW full range, but never analyzing music as it was played. At present I have been using the USB microphone that came with my Emotiva XMC-1. Of course it is not calibrated, and when I posted on the HTS - REW forum about a calibration file, I got crickets.
Since I do not drink coffee, I would need to defer, I could however provide one of a variety of Rums, including two types of Cuban Rum. I often also have Single Malt Scotch around. Perhaps a Fat Tire Beer?
No coffee?!!!! Bummer...LOL, I am an eclectic. Just today (as Sunday) they brought me a bottle of my favorite rum...I had a shot right after the Oscars...so, that's covered for the week. Likewise for the Scotch, had some at a friend's on Saturday. However, I don't remember trying that beer...sounds mighty interesting.
These days one can get a new (and useful) calibrated mic for <$20. I'll see if I can bring my portable one to show you.
BTW, analyzing music as it is playing is not usually a practical day-day thing, though it can have some useful applications. I only use it on a comparative basis. For example comparing 1 minute of track X with/without...woofers, or filters or something. It is only as a quick tool. If I need to go further, I use other tools, which I'll show you later.
For example, I only posted some graphs but I actually generated others to cross-reference via another program that same evening. One such is below. Done with another program, it looks at the frequencies present in the digital source file for that same period of 1.5 minutes of Three O'clock Blues. One thing it confirms is that frequencies below 40hz ARE present in the recording, but not as strongly as at 40hz and above. This jives well with what REW "heard" though they are different measurements. One is frequencies. The other (REW) is SPL peaks reached at each frequencies. No rocket science inovolved, though. LOL. If I can do it...
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