Reading measured room

[chinocurva]

Hey, folks!

I use to read "what the room has to tell me" about low/mid low freqs running Ethan's sweep tone (downloadable from RealTraps).
But lately I've been recording pink and white noise too, along with some snapping and clapping etc., to have other readings.

A friend of mine has ETF and I'm about to ask him to go and play around with it to see if it's worth to buy.
Here's my question: Can I open one of this files I've recorded (e.g.: pink noise) on ETF and make a reading of my acoustic test? Or ETF is just for "live" measurement?
If not, can I do so (reading pre-recorded files) in other softwares?

Thanks in advance!
Regards!

[Ethan Winer]

Can I open one of this files I've recorded (e.g.: pink noise) on ETF and make a reading of my acoustic test?

No, ETF provides its own test signal and the analysis depends on sync'ing with the signal content. ETF has both noise and sweep tones, and you'll get the best results with the longer (5 seconds) full-range sweep option.

--Ethan

[Don T]

Hello,
What I do with tests like the one you are suggesting is use a spectrum analyzer plugin. You can measure the RT60 and frequency components in the file depending on source noise. The analizer should let you alter the "window" of time that it sees giving you frequency and amplitude data. I pound on walls, use burst noise or white noise. I also record empty inactive rooms to document the noise floor and any vibration noise coming from HVAC systems etc. Frequency will give you rpm of vibration or hum to help isolate problems.

Remember that sweep tones and white noise give very different results due to filter bandwidth (white noise) and standing wave phase response (sine waves). Not to mention random hi fz diffusion off low fz wave fronts (white noise).

Always qualify the conditions of any test you do. If you make an assumption about the data you are looking at, figure out a way to varify the result. Ie: If "this" is true then "other" must also be true. Test for the "other" result and compare data. Sometimes the results are so varied and small that you have to move only on trends rather than absolutes. Only the biggest of problems are absolute, nothing else. As you fine tune over time the trends will lead you to a great sounding room. You are never finished with your studio although you take breaks in between your design efforts to work on projects to make money.

[chinocurva]

Thank you guys for the help!
I'm about to work this files in any moment.

Thanks again.

Reagrds.

Chino