Frequency analysis apps

[LittleRichie]

Looks good and the price is right. Thanks for the link

 

[sqlsavior]

If you take your measurements when playing music, your results are colored by the frequency spectrum of the music you happen to be playing - your results are for that song, not a system response. To take measurements, you need a source where the loudness at each frequency is the same, or that follows a known distribution of energy across the spectrum. Lookup the terms 'white noise' and 'pink noise'.

 

[LittleRichie]

Yes I believe my A/V receiver will generate white noise but I’ll have to double check that. Thank you

 

[JoeESP9]

Does your receiver have an auto eq function?

 

[LittleRichie]

Does your receiver have an auto eq function?

No. And the only test tone I can find at the moment is designed for the surround testing

 

[TudorTurtle]

When you get your mic and test using a frequency sweep tone (use the RTA feature), I think you'll see a very different response curve.

 

[JoeESP9]

I used the auto eq feature testing of my pre/pro (Emotiva UMC-200) to do an auto equalization. I then compared the results from using REW and a mic. They are so close I use REW and mic to set my DSP.

 

[mbz]

Guys at diyaudio did a write up on using REW to measure distortion etc... sadly there are some mixed messages but it is useful.
They suggest getting a better quality sound card than what's in PC's etc..
https://www.diyaudio.com/forums/software-tools/338511-howto-distortion-measurements-rew.html

 

[wyn palmer]

I’ll let you know what I find. I was told the app recognizes the mic and compensates accordingly but I don’t know how true that is. It’s been interesting so far to say the least.

With REW you need a calibration file for the mic.
Using REW and a miniDSP UMIK-1 | Audio Science Review (ASR) Forum
I use a mic by a different manufacturer than the umik-1 and they provide a cal file.
I also use an RME ADI-2 PRO FS R BE for the ADC/DAC rather than a PC sound card, which makes it great for characterizing gear as well as rooms.
John Mulcahy, the Irish designer of REW does a great job on the software and he's quite helpful
Donations are always welcome even if the software is free.

 

[JoeESP9]

Most of the currently available calibration mics are the same mic from different sellers. All of them include a link to download the individual calibration file.

Home Theater Shack has a thread specifically about REW with questions answers and discussions.

FWIW: My mic is from Behringer and included a link for the specific calibration file.