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shepards tone
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talolard
IsraTrance Full Member
Started Topics :
64
Posts :
282
Posted : Jan 3, 2005 23:43
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http://en.wikipedia.org/wiki/Shepard_tone
check this out. it seems like an effect i hear alot in tracks. but im not sure if i understand it.
what do you think?
  Work like you don't need the money.
Love like you've never been hurt.
Dance like nobody's watching.
natanofgaza@yahoo.com |
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NikC
BeatNik
Started Topics :
40
Posts :
601
Posted : Jan 4, 2005 01:21
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like in supermario 64
when you walk up the stairs to try to get to the last bowser boss.
its a nice effect, but because of how multilayered it is, i'd be surprised if it is used properly in any tracks.
as a classically trained musician it was something i studied before, its a musical illusion (like an optical illusion) which tricks the ear into thinking it hears a scale that never stops going up, when in fact its the same scale fading in and out as the notes are hit at the same time with different velocities (if that makes sense)...
By the way if you listen to the Shepard-Risset glissando example though, the high notes fade in too fast so it is not as convincing as it can be.
try it though, its fun
PEace |
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PsYx
IsraTrance Junior Member
Started Topics :
12
Posts :
339
Posted : Jan 4, 2005 01:27
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U can create such effect with a ring-modulator...if u set it right, it will seem that it's goin up or down forever. |
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PsYx
IsraTrance Junior Member
Started Topics :
12
Posts :
339
Posted : Jan 4, 2005 01:30
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NikC
BeatNik
Started Topics :
40
Posts :
601
Posted : Jan 4, 2005 02:01
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Apparently this is how the sound should be created:
s(t) = i=1..numberOfComponents Ai(t) sin (argi(t)), where
argi(t) = 2 fi(t) dt , and
fi(t) = lowestFrequency · 2(i - 1 + t/(12/frequencyChange_st), with
Ai(t) = Lmin + (1 - Lmin) (1 - cos 2i(t)) / 2, with,
i(t) = ln ((fi(t) + 1 Hz) / (lowestFrequency + 1 Hz)) / ln ((maximumFrequency + 1 Hz) / (lowestFrequency + 1 Hz))
Lmin = 10-amplitudeRange/10, and,
maximumFrequency = lowestFrequency·2numberOfComponents-1
if actually anyone understands this, i am truly truly impressed!
i understand jack shit of what that means haha 
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UIU
IsraTrance Full Member
Started Topics :
88
Posts :
238
Posted : Jan 6, 2005 15:07
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XrTC
Started Topics :
7
Posts :
720
Posted : Jan 6, 2005 15:51
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