APOD and General Astronomy Discussion Forum
https://asterisk.apod.com/
Yes, it does. Although, to be a bit pedantic in the face of a light-hearted observation, barcodes are binary, while the ring image is not. If we were using this system to "play" a barcode, there would only be two tones.GoshOGeeOGolly wrote: ↑Tue Apr 24, 2018 7:13 pm Also looks like the UPC.
Thanks HellCat! FYI, for the video you linked we used the notes of the harmonic series instead of the more pleasing major/minor harmony used in the app. Plenty more videos/apps on the way!
Also, forgot to mention, here is a video of the app in action, enjoy!
That reminds me of the time when I (very briefly) visited a nunnery and listened to the nuns when they sang during one of their nine or so daily meetings to sing and pray.Chris Peterson wrote: ↑Tue Apr 24, 2018 7:19 pmYes, it does. Although, to be a bit pedantic in the face of a light-hearted observation, barcodes are binary, while the ring image is not. If we were using this system to "play" a barcode, there would only be two tones.GoshOGeeOGolly wrote: ↑Tue Apr 24, 2018 7:13 pm Also looks like the UPC.
That is not the question I am asking. "higher pitches" means a change in the frequency of vibration. The intervals between all pitches heard in this example correspond to very specific frequency ratios; Octave 1:2, fifth 2:3, fourth 3:4 and so on. The question then is: did the astronomers find that relationship between the different brightness of the rings or did the technician who made the demo assign arbitrary values to the pitches to make them sound more pleasing? Big difference, and if the relationship is actually something else altogether it would be fascinating to hear it as it really is. Perhaps the Universe has something to teach us when it comes to music!bystander wrote: ↑Tue Apr 24, 2018 2:45 pmgustavomoretto@yahoo.com wrote: ↑Tue Apr 24, 2018 2:41 pm My favorite web page period.
But hey! Are the different piches proportional to the different brightness of the rings or at are they arbitrarily chosen by the technicians...
Big, big difference!
I'm a musician and I'm dying to knw the answer.APOD Robot wrote: ↑Tue Apr 24, 2018 4:11 am In the featured sonification, increasing brighter regions of Saturn's central B-ring play as increasingly higher pitched notes.
The ring intensity range is continuous and linear. The algorithm used must bin the brightnesses into widths corresponding to the desired intervals. Otherwise this would sound more like a Theremin than a harp. Here's what the histogram looks like.gustavomoretto@yahoo.com wrote: ↑Thu Apr 26, 2018 11:12 amThat is not the question I am asking. "higher pitches" means a change in the frequency of vibration. The intervals between all pitches heard in this example correspond to very specific frequency ratios; Octave 1:2, fifth 2:3, fourth 3:4 and so on. The question then is: did the astronomers find that relationship between the different brightness of the rings or did the technician who made the demo assign arbitrary values to the pitches to make them sound more pleasing? Big difference, and if the relationship is actually something else altogether it would be fascinating to hear it as it really is. Perhaps the Universe has something to teach us when it comes to music!bystander wrote: ↑Tue Apr 24, 2018 2:45 pmgustavomoretto@yahoo.com wrote: ↑Tue Apr 24, 2018 2:41 pm My favorite web page period.
But hey! Are the different piches proportional to the different brightness of the rings or at are they arbitrarily chosen by the technicians...
Big, big difference!
I'm a musician and I'm dying to knw the answer.APOD Robot wrote: ↑Tue Apr 24, 2018 4:11 am In the featured sonification, increasing brighter regions of Saturn's central B-ring play as increasingly higher pitched notes.
Yes, Chris is right. We've binned the brightnesses of the pixels into 13 steps and mapped them to a chosen set of notes to communicate the relative brightness variations. I've played around with a more continuous version using an oscillator (really 256 steps) and might publish it in the future. There are real examples of musical frequency ratios within the full ring system though, as orbital resonances with some of Saturn's moons. For example, here is the scale played by Janus and Epimetheus: https://youtu.be/SsFZlSQdPWU.gustavomoretto@yahoo.com wrote: ↑Thu Apr 26, 2018 11:12 amThat is not the question I am asking. "higher pitches" means a change in the frequency of vibration. The intervals between all pitches heard in this example correspond to very specific frequency ratios; Octave 1:2, fifth 2:3, fourth 3:4 and so on. The question then is: did the astronomers find that relationship between the different brightness of the rings or did the technician who made the demo assign arbitrary values to the pitches to make them sound more pleasing? Big difference, and if the relationship is actually something else altogether it would be fascinating to hear it as it really is. Perhaps the Universe has something to teach us when it comes to music!bystander wrote: ↑Tue Apr 24, 2018 2:45 pmgustavomoretto@yahoo.com wrote: ↑Tue Apr 24, 2018 2:41 pm My favorite web page period.
But hey! Are the different piches proportional to the different brightness of the rings or at are they arbitrarily chosen by the technicians...
Big, big difference!
I'm a musician and I'm dying to knw the answer.APOD Robot wrote: ↑Tue Apr 24, 2018 4:11 am In the featured sonification, increasing brighter regions of Saturn's central B-ring play as increasingly higher pitched notes.
UCSB postdoctoral fellow Greg Salvesen takes data sonification to a new level with his Astronomy Sound of the Month website
Scientists often transform astronomy data in a way that allows for interpretation with visual plots such as color-coded graphs. UC Santa Barbara postdoctoral fellow Greg Salvesen went in a different direction. He decided to instead map raw data to sound to make the excitement of astronomy — a traditionally visual science — accessible to people with visual impairments.Click to play embedded YouTube video.Sonification: Mark Heyer — Visualization: Greg Salvesen — Image: Robert Hurt
Data Credit: Anderson et al. (2011); Kalberla et al. (2005); Dame et al. (2001)
Salvesen’s recently launched website, Astronomy Sound of the Month or AstroSoM (pronounced “Astro Psalm”), features different sounds produced from actual astronomy data, along with a brief explanation written by an astronomer. ...
For his latest feature, Salvesen collaborated with University of Massachusetts astronomy professor Mark Heyer to produce a piece called “Milky Way Blues” that allows listeners to “hear” how our galaxy rotates. Heyer created the sonification and Salvesen supplied the visualization, incorporating an existing image of our galaxy created by Robert Hurt of IPAC/Caltech. The combined efforts reduce complex data into visual and aural components that track the movement of gas through the galaxy. ...