Purrin et al., these graphs are great - I should have commented earlier to thank you for the work. Now, I've got a couple of technical questions, if you don't mind spending a bit of time explaining to someone too lazy to read a textbook, such as myself : )
I've got no experience using FFTs for audio data, but have a pretty good idea of the method for engineering purposes. So, here's a few questions - what does 'front window' and 'back window' mean? Are you using a Blackman-Harris window for half of your 512 samples, and then a rectangular window for the other half, meaning that this half all has equal weighting until the 512th sample, after which there's an abrupt cut-off? If so, what's the advantage of this over using a full window rather than a half and half? If this is correct, then which half is the front and which is the back?
With such a long window of 10.67ms, there much be a very large overlap between each one - quickly casting my eye over the graphs, it looks like each window is shifted 2 samples along from the previous. Did you need a window this long to obtain sufficient frequency resolution, or was there another reason?
If I've completely missed the point of what you're doing, and you're struggling to politely tell me I'm asking stupid questions, feel free to point me towards a textbook or paper that explains it (we have electronic subscriptions to most engineering and mathematics journals, so that should be fine).
Thanks, and keep up the great work!
p.s. that HD800 appears to be an incredible piece of kit - I should give one an audition sometime, though I might get some strange looks if I fire up MATLAB during my listening session...
Edited by Arleus - 9/24/11 at 6:00am