REW: Can you display more than one saved curve in RTA ? and bonus question pink nosei

[preston]

Currently I only know how to display one reference curve when I'm doing a live RTA. Is there a way to have multiple saved curves on the screen ?

Obviously I know you can see them all together on the "All SPL" main screen but I'd like to see them while I'm tuning pink noise.

Follow up question - I am using the REW Pink Noise generator (wired from the laptop output to the aux input on the stereo with a mini RCA style plug), and lately I have been choosing "Pink Noise PN" as the description makes it seem more optimized for REW analysis than the plain "Pink Noise" option.

Is this a good choice ? Would I be better off using a WAV file or CD that specifically calls out "uncorrelated pink noise" ? I guess theoretically it would be higher fidelity and perhaps more representative of what the system does when playing although the RTA screen
indicates the sound card pink noise is full spectrum.

[Jdunk54nl]

Once you get your individual speakers tuned with the individual curves for them, just display the overall curve at that point.

Periodic pink noise is the best choice for REW and the RTA window as long as you have what is being generated matched to what the window is expecting.

Also, as Nick (skizer) and Justin Zazzi have both told me, correlated pink noise always (Pink PN from REW is correlated). Otherwise you will never be able to check for center (as there would be no common information from the speakers to get a center).

[preston]

So I think what you are saying is there isn't a way to disply multiple saved curves on the RTA screen.

I have my reasons for wanting to do so.

[jrwalte]

yes. Load up all the measurements you took so they're all listed on the left side and then select the "ALL SPL" tab.

Then you can un-check ones you don't want to see.

[Jdunk54nl]

yes. Load up all the measurements you took so they're all listed on the left side and then select the "ALL SPL" tab.

Then you can un-check ones you don't want to see.

He knows that and said that in the Original post. He wants multiple on the RTA screen. I don't know of a way.

[preston]

Thanks but I'm talking about the RTA screen where you can view the input wave form as measured in real time from the microphone. Besides the microphone input, you can also display another previously saved reference or measured frequency response curve.
But as far as I can tell you can only see one saved curve at a time (plus the real time input) on this screen. I would like to see multiple curves, very similar to what you can do on the All SPL screen except being able to compare them to what I'm measuring in real time.

[jrwalte]

I don't think that's the program's intention. You have to save the measurement and then you can compare it.

[Jdunk54nl]

I could see the benefit of having, for example, the tweeter curve you are trying to ultimately match, but also having the other tweeter actual response overlayed. That way you can see how close to both you are getting without having to save, go to all spl, select, etc.

[jrwalte]

technically you can do that. Select the one you want on the SPL & Phase then select RTA. It will display that saved RTA to compare. But I don't see a way to list multiple saved.

[preston]

I could see the benefit of having, for example, the tweeter curve you are trying to ultimately match, but also having the other tweeter actual response overlayed. That way you can see how close to both you are getting without having to save, go to all spl, select, etc.

Exactly.

I actually have a lot use case scenarios where this would be useful, but it sounds like I"m not missing some hidden option or anything, just wanted to make sure I wasn't being obtuse. For example it took about 3 months to realize you could change the reference curve that is displayed by clicking on it on the main screen. I just always assumed you could only see the last thing you saved ha ha.