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Analysis of knowzy samples
Axon
post Feb 18 2009, 16:22
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Steely Dan, Aja, Home At Last. CD vs AT LP-2D USB table, L+R and L-R signals. Window length is 300ms, overlap is 66%, Blackman-Harris window.

EDIT: Deleted pic because I looked at the code and it has serious issues. I'll post updated (and more) pics soon.

This post has been edited by Axon: Feb 19 2009, 16:14
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Axon
post Feb 19 2009, 17:22
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Group: Members (Donating)
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New pics.
  • Huge bug fix #1: Removed some experimental filtering code I had in place for some other vinyl investigations. Woops.
  • Huge bug fix #2: Plots were being clipped somewhere around 5-10khz but being displayed as if they went all the way to 22k. Woops.
  • This time I've split up the plots into 1-1k and 1k-22k, because the response ranges for both tend to be vastly different, and because different blocking factors work better at different frequencies.
  • Overlap is now 75%, Hanning window, mean of amplitudes of windowed spectra.
  • Window length is 1s for 1-1k plot and 0.1s for 1k-22k plot.
Plots as follows:
  1. 1hz-1khz, Pink Floyd "On The Run", CD vs AT2D, complete song - I'm pretty sure the CD is the 1991 Capitol version, so not the 20th anniv version that Jeff has (I think).
  2. 1khz-22khz, Pink Floyd "On The Run", CD vs AT2D
  3. 1hz-1khz, Steely Dan "Home At Last", CD vs AT2D (snip)
  4. 1khz-22khz, Steely Dan "Home At Last", CD vs AT2D (snip)


As usual, black is L+R, red is L-R.

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This post has been edited by Axon: Feb 19 2009, 17:27
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