Need some sound 101 Advice about Pink NoisePink Noise Problem
Posted 26 February 2013 - 08:26 PM
I am Eq-ing my room. I have at my command a Crown RTA-2 and a digital RTA. Both have Pink noise sources. I also just refurbed all the filters in the RTA-2 by replacing the known to go bad tantalum caps and the electrolytics. I have the EQ2 equalizer and the digital RTA has a digital 31 band 2 channel equalizer as well.
I bought a dongle type device that has microphone balanced output of Pink noise which I was going to use to calibrate the RTA-2 filters. I checked it's output and it is sloped 3db/octave. All the other Pink noise sources are flat. Now I know that Pink noise is white noise that has been filtered with a 3db/octave filter but has equal spectral power across the spectrum. So should the output of a Pink Noise source be flat or sloped? The Crown RTA-2 Pink noise is flat in the manual graph and on the digital RTA. and on the Crown RTA-2 it's self. The digital RTA Pink Noise source is flat on it's own RTA and on the Crown RTA-2. The dongle is sloped on both.
I think the device is wrong. The creator/manufacturer insists it is correct. Help! what is going on here?
Posted 26 February 2013 - 09:16 PM
Posted 28 February 2013 - 01:10 AM
Posted 28 February 2013 - 05:19 AM
My sentiments exactly.
Posted 04 March 2013 - 04:21 PM
Posted 25 March 2013 - 06:50 AM
If anyone feels that this is not correct please update this information! And again I thank the collective here.
Posted 25 March 2013 - 07:00 AM
I have been using spectral analysis to equalize my listening room for over 30 years. In the early days I used our hardwired TTL research computer at graduate school to do real time FFTs and using a ADS Soundshaper equalizer flattened the room response. As electronics got smaller and less expensive I used dedicated RTA's. The art IMHO of using this at home is finding acoustic room treatment that doesn't look like acoustic treatment i.e. tiles,baffles etc. Instead I use floor coverings, tapestries, furniture etc. in order to create a sound friendly room. I must say that the effort has paid off. One of my favorite tests is to compare a live instrument say a violin or piano to my system in a A B comparison. Blindfolded I have spoofed many "ears". To me that is the acid test, when instruments sound like the real thing.