Re: Looperlative LP1 - sample rate

[S V G <vsyevolod@yahoo.com>]

     Again, it's not so much about getting frequencies above 20K into our 
loopers, rather it's
about increasing the quality of sounds well within our hearing.  If the 
frequencies at 20K are
only allotted 2 samples per wave cycle, then an octave down only gets 4 
samples, 2 octaves down
only gets 8 samples, and 3 octaves down which is right around 2.5K only 
gets 16 samples per wave. 
Sampling at 192 would offer us 64 samples at 2.5K.  I don't know if my 
math is correct, but this
is how the numbers seem to be crunching.  Also, if my crunching is 
correct, I'm not sure how
perceivable this higher sampling rate actually is.  Perhaps someone on 
this list has experience
with these things?

     Stephen

     R.Chris Murphy wrote:
True. We can absolutely perceive below 20Hz, I live in LA, and we sure 
as hell feel earthquakes! I am actually in the camp that believes that 
there is important stuff happening above 20k. There were some test 
(that I was not involved with) where they switched between sine and 
square waves of about 15K, the difference between these two would be 
the addition of an additional frequency well above 20K and the subjects 
could here the difference.  Scientist are not sure why this is the 
case. It could be bone conduction (basically our skull shaking) or 
intermodulation, meaning the high frequency changes the lower one or 
maybe we can just actually hear that high stuff some how.

But how that applies to a looping instrument, I am not sure there is 
great value in a super high sample rate looper at this point. If you 
have any other digital device in your signal chain, you will have 
chopped off all that high end stuff first time you hit a digital box or 
foot pedal.
______________________
Ronan Chris Murphy

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