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Old 07-29-2015   #1
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Arrow Jazzi's tuning companion for room eq wizard

Note: See the link in my signature to download the latest version of this tool.

This spreadsheet has been a lot of fun to make! My goal is to take as much guesswork out of the tuning and installation process as possible. With this tool, you can calculate a safe high-pass crossover point for your midbass and midrange speakers, then plug those numbers into the next sheet where you choose what frequency response curve you want your overall system to have, and the tool will generate a set of custom house curve files tailored for each of your speakers. Import those directly into Room EQ Wizard and use the EQ module to find the filters for your DSP.

If you use the next sheet to calculate time delay settings for all of your speakers, and you get them to match the house curves exported from earlier, then your tuning is mostly done! I recommend spending some more time with 31-band pink noise tracks to get the center image perfectly centered, and you can download some ones I made from my dropbox at this link:

-----> 31-band pink noise tracks <-----

A bonus feature I included is an interactive chart to help you choose which size power wire and fuse for your amplifiers. The sheet will take into account the efficiency of your amplifier (effecting how much power it will need to be supplied with) as well as the condition of your car (engine on or off) and you can choose how much of a voltage drop is acceptable to you. Lastly, measure about how long the power wire needs to be and then you will see which size wire and fuse you will need. A ton of research went into this particular sheet, and I'm looking forward to everyone's feedback.

There is an included read-me with instructions for each section with some hints and cautions.

Like I mention in the included read-me, please let me know if this is useful for you and if you would like me to build more features into this spreadsheet.

Here are some screenshots:






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-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
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Last edited by cobb2819; 05-06-2016 at 09:24 AM..
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Old 07-30-2015   #2
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Default Re: Jazzi's tuning companion for room eq wizard

This is pretty cool. Thanks!
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Old 07-30-2015   #3
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Default Re: Jazzi's tuning companion for room eq wizard

With the crossover curve builder, is that easily adjustable in dB/frequency? I can't open it from work.

If so, this is exactly the thing I've been looking for. I've resorted to building my own in excel but nothing on this level that allows on the fly adjustments. Much appreciated.


Edit: read your description again. Looks like it's not exactly what I thought but it still will do the job. Kudos!

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Old 07-30-2015   #4
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Default Re: Jazzi's tuning companion for room eq wizard

I want to test this out ASAP.

I have been thus far using a house curve in REW and using the native Target Settings for a 24 dB slope crossover. But that crossover in REW is butterworth not LR.

I also tried using RePhase to generate target curves for LR24 slopes but that didn't work either.

Lastly, I tried using the ACD spreadsheets but they are incredibly complicated to use so I didn't get very far.

I'll check your spreadsheets out soon and report back.
Thanks for your efforts thus far!


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Old 07-30-2015   #5
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Default Re: Jazzi's tuning companion for room eq wizard

Really helpful tool Jazzi, thanks for putting it up here!
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Old 07-30-2015   #6
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Default Re: Jazzi's tuning companion for room eq wizard

Can't export the JBL curve, all the others seem to work. Tried on two different computers.
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Old 07-30-2015   #7
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Default Re: Jazzi's tuning companion for room eq wizard

Quote:
Originally Posted by SQram View Post
Can't export the JBL curve, all the others seem to work. Tried on two different computers.
Found the problem, will update with a fix a little bit later tonight.
Thank you for pointing this out!

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Old 07-30-2015   #8
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Default Re: Jazzi's tuning companion for room eq wizard

Beta version 2 has been uploaded.

-Fixed the text file export of the JBL/Andy curve
-Added more flexibility:
-Now you can select different crossover frequencies for your highpass and lowpass
-Now you can select between either a 12dB/octave Butterworth or a 24dB/octave Linkwitz-Riley crossover
-Cleaned up the interface a bunch, hid a lot of the background work

Future plans:
-If you can help me find the equations/formulas, I will add more options for crossover types such as Bessel, Chebychev, etc
-I would like to add a sheet to help you with time delay settings
-I would like to add more pictures and better instructions on how to use these text files within REW

Measure with mics, mark with chalk, cut with torch, grind to fit, sand to finish, paint to match.
-My 2002 VW Golf stealth SQ build (an engineering student's perspective)
-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
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Old 07-30-2015   #9
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Default Re: Jazzi's tuning companion for room eq wizard

Yes!!! I've been creating my own curves by manually creating a text file to align with my specific needs. I can't wait to give it a shot!

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Old 07-31-2015   #10
 
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Smile Re: Jazzi's tuning companion for room eq wizard

Great Idea,
However one small problem. What is the worksheet unprotect code so we can enter our own individual crossover frequencies.
Gerry
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Old 07-31-2015   #11
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Default Re: Jazzi's tuning companion for room eq wizard

Feedback:

Just loaded up your spreadsheets. This looks really great! You've done a very good job.

Very simple and intuitive layout. You made this so easy to follow. I have tried using the ACD spreadsheets in the past, and those are so complicated that I could never figure them out. And I always thought I was good with spreadsheets.

As I mentioned above, you are meeting a need which I have hoped to see met for a long time. REW has crossover settings available but they are only Butterworth 12 or 24 dB slopes. I prefer Linkwitz so I have been trying to find a way to get a downward sloping house curve with LR24 slopes for the crossovers. Your spreadsheet does exactly that. Very cool.


I have not been able to change the Frequency settings because those cells are protected by a password. Can you unprotect those cells for user input? I would like to try this out with my car, but I need to change the Frequency settings first.

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Old 07-31-2015   #12
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Default Re: Jazzi's tuning companion for room eq wizard

Quote:
Originally Posted by Jazzi View Post
[SIZE="5"]-I would like to add a sheet to help you with time delay settings
-I would like to add more pictures and better instructions on how to use these text files within REW
If you're interested, I can send over the excel file I made that was used to build this site:
http://tracerite.com/calc.html

You can just incorporate that in to your sheet. It would save you a lot of time. I even made one with temperature/humidity considerations.

LMK if you're interested and I'll send it on over.

- Erin

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Old 07-31-2015   #13
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Default Re: Jazzi's tuning companion for room eq wizard

Quote:
Originally Posted by ErinH View Post
If you're interested, I can send over the excel file I made that was used to build this site:

http://tracerite.com/calc.html



You can just incorporate that in to your sheet. It would save you a lot of time. I even made one with temperature/humidity considerations.



LMK if you're interested and I'll send it on over.



- Erin

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Old 07-31-2015   #14
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Default Re: Jazzi's tuning companion for room eq wizard

Great work. Going to try this tomorrow. It will great help

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Old 07-31-2015   #15
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Default Re: Jazzi's tuning companion for room eq wizard

Awesome, Jazzi! Thanks for all your work putting this together and for making it public.
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Old 07-31-2015   #16
 
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Default Re: Jazzi's tuning companion for room eq wizard

Nice. Thanks.

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Old 07-31-2015   #17
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Default Re: Jazzi's tuning companion for room eq wizard

Oops! I forgot about the locked cells, that is fixed now. Sorry!

---

Quote:
Originally Posted by ErinH View Post
If you're interested, I can send over the excel file I made that was used to build this site:
http://tracerite.com/calc.html

You can just incorporate that in to your sheet. It would save you a lot of time. I even made one with temperature/humidity considerations.

LMK if you're interested and I'll send it on over.

- Erin
Erin, that would be great, and save a lot of time indeed. Thank you for your offer.

Measure with mics, mark with chalk, cut with torch, grind to fit, sand to finish, paint to match.
-My 2002 VW Golf stealth SQ build (an engineering student's perspective)
-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
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Old 08-01-2015   #18
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Default Re: Jazzi's tuning companion for room eq wizard

Crossover point changes are working with the new link. Thanks Jazzi!

Quote:
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Old 08-01-2015   #19
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Default Re: Jazzi's tuning companion for room eq wizard

Pretty freakin' cool. Nice work!

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Old 08-01-2015   #20
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Default Re: Jazzi's tuning companion for room eq wizard

Dude your a bloody god send....

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Old 08-06-2015   #21
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Default Re: Jazzi's tuning companion for room eq wizard

More review:

I used the spreadsheet for a tuning session a few days ago.

It took me a couple of tries to get the export to work. FYI - Mac users, the spreadsheet will open on Office for Mac, but I don't think the export was working. So I opened it with Office on Parallels and it worked fine. No big deal.

I used a custom house curve by entering data on the right side column. It might be a nice addition if the frequencies on the custom column were also adjustable.


Just a note on REW house curves. When you load up these crossover curves, make sure you go into EQ section, then Target Settings and set "Speaker Type" to "None." The reason why is because these curves that the spreadsheet is generating already have crossover slopes applied. You want to disable the additional slopes added by REW.

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Old 08-06-2015   #22
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Default Re: Jazzi's tuning companion for room eq wizard

This is a awesome tool! Thanks!

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Old 09-02-2015   #23
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Default Re: Jazzi's tuning companion for room eq wizard

Thank you so much!!!! this is exactly what I was looking for!!

Big up to you!!

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Old 09-02-2015   #24
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Default Re: Jazzi's tuning companion for room eq wizard

I'm glad you enjoy it, and a big thank you to everyone for your feedback.

School has started again so I don't have as much time to put into this project as I wanted to, but perhaps I'll make some more progress again one day.

Measure with mics, mark with chalk, cut with torch, grind to fit, sand to finish, paint to match.
-My 2002 VW Golf stealth SQ build (an engineering student's perspective)
-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
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Old 09-02-2015   #25
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Default Re: Jazzi's tuning companion for room eq wizard

i just got rew up and running. im going to have to try this.

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