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Increasing the pitch of solar sound without decrease playback time?
Hi:
Adobe Audition seems to be able to change the pitch of an audio file without changing the speed at which it plays. http://www.adobe.com/products/auditi...2.html#kmhead3 "Time and pitch processing: Change tempo without shifting pitch - or shift pitch without changing tempo - and never introduce audio artifacts." I wonder if this technique could enable astronomers to hear the sun "sing" with having to increase the speed of the data they record. The sun's acoustic signals are way too low-pitched for humans to hear. So either the recording of the sun's acoustic signals has to be sped up until the pitch is high enough for humans to hear or the pitch itself needs to be changed using some intense processing [such as that of Adobe Auditon]. It seems that the former method is used instead of the latter. Why? If the audio software has sufficient abilities to increase the pitch of infrasonic signals to that in the human audio-range -- without increase the playback speed -- then why isn't such a method used? An advatange I see is that if the infrasound if for 5 minutes, increasing the pitch won't decrease the amount of time of the recording. Of course. An EXTEREMLY high-resolution of pitch-changing would have to be used in order to ensure that artifacts are not present. Such is not yet available. Thanks, Radium |
#2
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Increasing the pitch of solar sound without decrease playback time?
Adobe Audition seems to be able to change the pitch of an audio file
without changing the speed at which it plays. http://www.adobe.com/products/auditi...2.html#kmhead3 On a similar note there are (audible) sounds such that when played back at twice its speed, we actually hear it at a lower pitch ! |
#3
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Increasing the pitch of solar sound without decrease playback time?
wrote in message oups.com... Adobe Audition seems to be able to change the pitch of an audio file without changing the speed at which it plays. http://www.adobe.com/products/auditi...2.html#kmhead3 On a similar note there are (audible) sounds such that when played back at twice its speed, we actually hear it at a lower pitch ! Really? I find that amazing, and deeply counter-intuitive. But I realize that counter-intuitive isn't enough not to believe you. Could you expand a bit please? (meaning "could you please elaborate" - not "could you please grow wider"). Or supply an example? I'm fascinated! Are these tones audible both when played "naturally" and when pitch-shifted? Does this effect happen with natural or is the effect limited to exotic manufactured sounds? Is this an artefact of digital sampling? Al |
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Increasing the pitch of solar sound without decrease playback time?
wiki roger shepard -shepard tone.
Shepard is like a M.C Escher. Check out shepard's art too on google images. His tone thing is inspired by Cantor and Weierstrass functions. See book: "Fractals, chaos, power laws" by M. Schroeder, p95-98 Have fun. On a similar note there are (audible) sounds such that when played back at twice its speed, we actually hear it at a lower pitch ! Really? I find that amazing, and deeply counter-intuitive. But I realize that counter-intuitive isn't enough not to believe you. Could you expand a bit please? (meaning "could you please elaborate" - not "could you please grow wider"). Or supply an example? I'm fascinated! Are these tones audible both when played "naturally" and when pitch-shifted? Does this effect happen with natural or is the effect limited to exotic manufactured sounds? Is this an artefact of digital sampling? Al |
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Increasing the pitch of solar sound without decrease playback time?
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#6
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Increasing the pitch of solar sound without decrease playbacktime?
Radium wrote:
http://www.adobe.com/products/auditi...2.html#kmhead3 "Time and pitch processing: Change tempo without shifting pitch - or shift pitch without changing tempo - and never introduce audio artifacts." They're exaggerating, as Spock would say. It does introduce artifacts. But it works well as long as you don't push it too far. I wonder if this technique could enable astronomers to hear the sun "sing" with having to increase the speed of the data they record. I think that you can generally raise the pitch by around an octave, maybe a bit more, before the artifacting becomes a serious problem. I don't think that's enough here. Of course. An EXTEREMLY high-resolution of pitch-changing would have to be used in order to ensure that artifacts are not present. Such is not yet available. It's mathematically impossible to avoid the artifacts entirely, as the necessary information simply doesn't exist in the original waveform. What might be possible is to extract general properties of the solar wind sound from a large number of samples, and use that to synthesize a solar-wind-like sound at audible frequencies. -- Ben |
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Increasing the pitch of solar sound without decrease playback time?
Ben Rudiak-Gould wrote: Radium wrote: http://www.adobe.com/products/auditi...2.html#kmhead3 "Time and pitch processing: Change tempo without shifting pitch - or shift pitch without changing tempo - and never introduce audio artifacts." They're exaggerating, as Spock would say. It does introduce artifacts. But it works well as long as you don't push it too far. I wonder if this technique could enable astronomers to hear the sun "sing" with having to increase the speed of the data they record. I think that you can generally raise the pitch by around an octave, maybe a bit more, before the artifacting becomes a serious problem. I don't think that's enough here. Of course. An EXTEREMLY high-resolution of pitch-changing would have to be used in order to ensure that artifacts are not present. Such is not yet available. It's mathematically impossible to avoid the artifacts entirely, as the necessary information simply doesn't exist in the original waveform. Its possible to keep the artifacts below a perceptible level, though. Right? What might be possible is to extract general properties of the solar wind sound from a large number of samples, and use that to synthesize a solar-wind-like sound at audible frequencies. -- Ben |
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Increasing the pitch of solar sound without decrease playback time?
what I want to know is why you posted this to ....relativity?
Radium wrote: Hi: Adobe Audition seems to be able to change the pitch of an audio file without changing the speed at which it plays. http://www.adobe.com/products/auditi...2.html#kmhead3 "Time and pitch processing: Change tempo without shifting pitch - or shift pitch without changing tempo - and never introduce audio artifacts." I wonder if this technique could enable astronomers to hear the sun "sing" with having to increase the speed of the data they record. The sun's acoustic signals are way too low-pitched for humans to hear. So either the recording of the sun's acoustic signals has to be sped up until the pitch is high enough for humans to hear or the pitch itself needs to be changed using some intense processing [such as that of Adobe Auditon]. It seems that the former method is used instead of the latter. Why? If the audio software has sufficient abilities to increase the pitch of infrasonic signals to that in the human audio-range -- without increase the playback speed -- then why isn't such a method used? An advatange I see is that if the infrasound if for 5 minutes, increasing the pitch won't decrease the amount of time of the recording. Of course. An EXTEREMLY high-resolution of pitch-changing would have to be used in order to ensure that artifacts are not present. Such is not yet available. Thanks, Radium |
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