Posts by b0dhi

Quote: Originally Posted by eucariote Assessing discrimination abilities in humans from conscious reports is absolutely routine [snip] There is an important difference between assessing conscious discrimination...

Quote: Originally Posted by eucariote But I'm ready to accept the results of such a test, regardless of outcome. Just as I accept the conclusion that L-dopa leads to statistically significant increases of the chemical...

Thanks Nick_charles. To be honest I think what you suggested there, i.e., taking the difference of the files, is the best approach. I'm not at all convinced an FFT is a reliable way of detecting differences in these files since the...

Just in case anyone's using Wavosaur for any of this analysis - when I was testing RMAA, I noticed that THD increase by 300% after I did something with Wavosaur. So I did some more testing and found that simply opening the RMAA file and...

The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.

I think that will work. Been doing some tests and I got roughly +/- 0.3dB amplitude accuracy with a ~65k FFT and 4-term Blackman-Harris window having ~-90dB side lobe. Blackman (3-term) also worked within that accuracy. I tested with...

This might be helpful. In particular, see the table near the bottom comparing the type of signal to be determined and the window that would be appropriate for it. I know I have a book here that goes into the math and most importantly...

Quote: Originally Posted by nick_charles I downloaded a demo version of Autosignal. It is a serious package. I could not find a way to get the FFT size down, it kept giving me 81K samples so the text files were enormous...

Quote: Originally Posted by nick_charles A 2.3db difference is seriously worrying and not in just a perfectionist way this is way off. Using Audacity at its highest FFT size (16K) the biggest diff found was at 21449hz...

Here's what I got testing Audacity's fourier transform: Generated 2 dithered sine waves, 2 seconds long, 44.1khz 16bit, each @ -12.0dB (normalised to 0dB) 1khz and 13khz tones were generated this way, mixed, and saved to a single wav...