Best way to measure room response with laptop and SPL meter? (1 Viewer)

[Jason Price]

I've got a laptop and an RS SPL meter and I want to measure the frequency response of my 20-39CS+ in my room. I seem to recall reading of people connecting their SPL meters to computers and using some software to get an accurate representation of their rooms. I also need to download a test-tone cd for this. So, I need to know how to connect the SPL meter to my laptop, what software to use (free, if possible), and where to download a test-tone cd. Can anyone help me out?

 

[Rick Radford]

Jason, if you have a full duplex sound card in your laptop, you'll benefit from using ETF5. I think you can also use a half-duplex card and get the MLS tones from ETF and burn a CD too. You can get a free demo that works. You just can't save/print files nor take more than 2 measurements without restarting the program.
Regular test tones will not work with ETF. The have to be MLS signals. (maximum length sequence)
Read about it here:
http://www.etfacoustic.com/
Check out these help sites: the first if you plan to use ETF and both if you plan to get a BFD1124p.
http://www27.brinkster.com/jmag999/
http://www.troycable.net/~snap/bfdinfo.htm
HTH.