conquistadore
Forum Moderator
Joined: 03 Aug 2004
Posts: 514
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| Pitch Change |
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hi,
why is it that when the speed on audio sample is reduced, the pitch changes?
thanks |
Mon Mar 14, 2005 2:57 am |
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AUdIoCoUrSeS
Joined: 31 Oct 2002
Posts: 2014
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| Sampling rate |
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If a digital audio sample has been recorded at a specific clock rate (i.e. 44.1 kHz) then it will need to replayed at the same clock rate in order for the slopes of the waveform to be re-constructed correctly.
The point is that the clock has meaning against the individual sample periods.
Playing the sample back at a lower clock rate (sampling rate) will make the slope of the waveform to be less steep and therefore lower in pitch.
Sample rate converison however, corrects this, as re-sampling takes place.
Does that help?
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It's all in the ears. - Learn the concepts not the software.
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Mon Mar 14, 2005 8:30 am |
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conquistadore
Forum Moderator
Joined: 03 Aug 2004
Posts: 514
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| Analog Tape |
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Yeah that helped.
That is to do with digital audio. What about a tape? Sometimes when the motor slows down, the pitch reduces. But there is no sampling rate in an analog tape...is there?
thanks
P.S : I seemed to have stopped getting mail notifications about topics I'm 'watching'. |
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Mon Mar 14, 2005 9:04 am |
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AUdIoCoUrSeS
Joined: 31 Oct 2002
Posts: 2014
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| Cycles |
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If a tape is slowed down the information going passed the playback head is slower, again making the frequency or rate slower.
You need to understand a fundamental concept that pitch is related to time, it is the number of cycles per second, less cycles per second is a lower pitch.
_________________
It's all in the ears. - Learn the concepts not the software.
Audio Courses is a way into the music business for you
Last edited by AUdIoCoUrSeS on Mon Mar 14, 2005 11:27 am; edited 1 time in total |
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Mon Mar 14, 2005 9:39 am |
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conquistadore
Forum Moderator
Joined: 03 Aug 2004
Posts: 514
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thanks...dint think of that!
conquistadore |
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Mon Mar 14, 2005 9:51 am |
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