pink noise [see wiki] is a very interesting phenomena where the frequency spectrum has a 1/f curve.
but many musical instrument’s harmonics often show this 1/f like curve as well, a interesting fact is, if the frequency spectrum curve is smooth (no leakages [see wiki] or holes ), then they don’t sounds like noise any more. otherwise they sounds more noisy.
blow is a sample pink beat I found from this link http://www.brusi.com/downloads.shtml, a download link is provided below, you can try it first and then read on.
in matlab, the periodogram analysis shows the PSD like this,
and the time domain waveform as below
to compare it with another base generated by Maxim Vedenev
from http://dj-toolbox.9f.com/
and PSD
personally, I would say the pink beat is more rich with dynamics and sounds more attractive,and the drum beat is more pure and more leaky in the spectrum, but that’s not end of story.
I will post a second blog which explain the windowing effect on PSD and spectral smoothing. thanks for reading.
No comments:
Post a Comment