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     The Cardhouse robot recently pointed out this article, which discusses the cover art for Kate Bush’s forthcoming album “Aerial,” correctly asserting that it is “right up my alley.” The central image of rocks reflected in water is also clearly representative of an audio waveform. While this has been mentioned on Kate Bush message boards, I wasn’t able to find any investigation into what exactly the content being represented was, so I decided to poke around a little bit.

Aerial Thumb

     I found a relatively high resolution version of the cover online (click the image above to download), then used Photoshop to adjust the contrast until I had a relatively distinct image of the waveform. Obviously, this isn’t the best method to use if you’re attempting to preserve the integrity of the waveform, so I definitely lost some resolution by doing it this way.

     At any rate, I ended up with the image you see below. Click the image to obtain a higher resolution version for your own experimentation.

     The next step was to turn the finished image into sound. To accomplish this, I used a windows program called Bitmaps & Waves. This required that I cut the image of the waveform in half – which produced the image below. Same ‘click for higher-res’ standard applies for the whole of this article.

     Feeding the image of the half-waveform into Bitmaps & Waves resulted in a full audio file, as seen below.

     Here’s an image of the finished audio file. Close enough, right? So what’s it sound like? Download it here, or click on the player below.

Kate Bush – Aerial Cover Waveform

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Admitting Defeat

     So why does it sound like that? I should first preface this with the fact that I didn’t retain very much of the soundwave stuff I learned in various physics classes, and everything I say from here on in is based on stuff I’ve picked up while using audio editing software. In short: take everything with a grain of salt.

     My understanding is that the file I produced emulates only the volume envelope (variation in level), and position with respect to time (rhythm) of the recording, and not the actual sound waves (oscillations) being produced. Bitmaps & Waves appears to use a simple Sine oscillator to generate the soundfile based on the image you provide. Based on this, I don’t think it’s possible to retrieve the actual audio content being displayed on this cover, so rather than stay up any later thinking about this, I’m handing off my work as it stands to the internet at large. Maybe someone with more insight will devise a way to figure out what the damn sound is.

     My current theory is that it’s a clip of the lyrics from the album, and that some obsessive Kate Bush fan would be able to determine which bit of the album is represented by comparing the Waveforms of the album audio with the image on the cover. Believe it or not, even I’m not that obsessive. No, really.

Update: Mystery Solved

     Well, if you read far enough down into the comments on this post, you’ll see that someone has, in fact, located the bit from the album that appears on the front cover. Turns out it’s a bird call, which is available as an MP3, here.

Kate Bush – Aerial Bird Waveform

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Bird Call

     As many suggested in the comments, speeding up the MP3 I originally produced several hundred percent was indeed the way to go — doing so actually produces a pretty convincing match to the rhythm of the source audio. Here’s an MP3 consisting of both the source ‘bird call,’ and my original recovery effort played together, for the extra inquisitive among you.

Kate Bush – Aerial Cover Waveform Comparison

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

 
Comments
10.3.05
Jason says:

I just ran into your site….and let me tell you. I like you. And this. Keep it up

-J

10.3.05
Zach says:

I’m glad the graphic designer hired for this album took approximately 3 minutes to create the cover in photoshop. So lame!

10.3.05
Mike says:

http://www.gigwise.com/news.asp?contentid=8891 has a brief little write up on this, interesting stuff…

10.11.05
Alan says:

Of course! “The true message will only be revealed when you buy the album.”

10.11.05
Uncle Vinny says:

Have you tried speeding the sample up, so that it takes 3 seconds to play instead of 30?

10.11.05
LL Cool F says:

It says “All your base are belong to us.”

10.12.05
gorjus says:

This? Is so, so rad. Got here via Stereogum, by the by.

10.12.05
jaykayess says:

I don’t know anything about Bitmaps And Waves, but the cover art only shows the envelope of the sound– if it also had the pitch, it would look like a big gray zigzag, and not a solid blocky color (if that makes any sense!)

10.12.05
Hangnail says:

This was a fascinating and noble attempt at doing the impossible. The visual graph used in most wave editors is a representation of amplitude vs time. As your mp3 shows, the missing ingredients, frequency, timbre, etc are not represented here.

Perhaps a better approach would be to record the CD and study it for this sequence.

10.12.05
Jason says:

And doubtless, some one is gonna do that (or has already done that)

10.12.05
john says:

It’s Kate Bush saying “Paul is dead” backwards, now go to bed.

10.13.05
fishy says:

There is a track on the upcoming album with birdsong, bet it’s a sample of a sound file

10.13.05
barry says:

you are awesome

10.14.05
ied says:

A noble effort, thanks!

10.15.05
Dave says:

I’m a sound editor by profession and thus I spend a lot of time looking at waveforms and projections like these. All I can say is that you can’t decode the image back to sound, since it’s not zoomed out enough. You do not have enough information.
It’s even hard to tell weather tis is speech at all. It could as well be any instrument, like a sax. There’s also no information about the fundamental pitches, let alone the sound spectrum modulated over those.
To do a analysis, you need to be zoomed in to these waves a bit more. Then you can tell the chaotic moments like “t” and “s”, and the pitchy ones. But even then, it’s hard te understand it as speech. Speech is way to hi-res for such an image.

I enjoyed the article though. A lot.

10.15.05
june owens says:

Jesus, Kate if you read this – what a load of cranks. Please just keep writing music – you lot who do you think you are Steven Hawkins stop trying to analyse every breath Kate makes just sit back and enjoy like a fine wine. too much thinking hurts your brain!!! Love June
Ps Stop being “Heavy People “

10.16.05
John says:

I say let’s give the graphic designer/art director some credit. Using very simple imagery and precise composition, he/she has evoked a graphic treatise on the blurred boundary between sound and vision. Maybe that’s something Kate Bush explores on this disc? Sounds feasible given the painting/sunset/sunrise lyrical motif.

June–lighten up. Thinking isn’t such a bad thing and nobody’s getting hurt, so lay off.

10.16.05
Jack Foster says:

Thanks a lot man. Listen, I’m a graphic designer, not for EMI or records for that matter, but I put a lot of work into ‘encoding’ my stuff. It’s about being multi-layered, and for the people out there who want to go that extra mile, there’s something around that corner for them. I won’t presume to understand Ms. Bush’s mind or motives but it seems like she applies a lot of depth to her music as well as her visuals, I’d go so far as to say I doubt it’s a random wave, and i doubt she’d put it there if she didn’t want people to perceive that it has some connxion, whether literal or just text painting. You’re not a nutte, not obsessed, it’s just like doing a crossword and my hat, for one, is off to you.

10.16.05
Rick Kahn says:

I am familiar with waveforms having used Sonic Foundry (now Sony) Sound Forge. I believe that Kate simply liked the way the waveform looked, that’s it. I don’t think there is any cryptic message although I would have to hear Aerial to know that.

It is an interesting project you took on. I say this while listening to the waveform you produced. Is it possible that maybe this waveform follows the mood from one track to the next? Great job at checking this out though.

I met Kate Bush at a party thrown for her by EMI in Canada. This was at the King Edward Hotel in Toronto. At that time they were giving her an album sales award (gold or platinum-don’t remember) for Hounds Of Love. I will predict here that Aerial will become her biggest album, sales wise, to date. Now that all her clones are gone, Kate can come back to the forefront. Go figure, Kate’s timing was just perfect. I have yet to find any tracks to hear from the album other than King Of The Mountain. No, wait, I thought I had Aerial Tal (track 13) but it’s a fake. Yes, I have ordered the cd from a UK dealer as a matter of fact; I just want to hear the album already.

Anyway, all the best to Kate. Oh, and thanks for the letter you wrote and the Hounds Of Love album cover you signed for me Kate. I still believe that other than Joni Mitchell, there has been no better female singer ever than Kate.

10.17.05
Grand says:

Cat’s out of the bag! Adam is Kate Bush!

10.25.05
Ziggy says:

Hey!
I really enjoyed it and I appreciated all the work you put into this.
I read some comments here, and all I can say to the ‘critical voices’ is this: Kate Bush has always been a pioneer, especially in the field of sound sampling and the use of vocals. Just listen to The Dreaming – Leave It Open – where she is flangering her voice into a deep, cool hollow. Pretty spaced-out for a 24-year-old lass!

10.25.05
Kent Coltrane says:

I played the clip of the wavefile you created and it told me to go sell my car, divorce my wife and have a sex change! It’s an encrypted mind control device you have unleashed on the world – AAAAAAAAAAAAAAHHHHH!

10.27.05
Anonymous says:

Hi great work! but thanks to a post by dannis on thee homeground forum
there is a photo ov thee back cover ov Aerial showing two more waveforms
could you combine these three waveforms?

photo here http://www.streetsonline.co.uk/default/templates/catalog/dvd_cover.jhtml?prod_id=50486367&op=large_image&image=IMGBC

10.29.05
Michele says:

I have a copy of the record and the soundwaves are also part of the booklet. On the last page it says these are the sounds of various species of birds. Kate loves birds, as you know. The album is spectacular and gets better on each listen.

11.5.05
rikki nadir says:

‘Aerial’ is what you Americans call an antenna – turn the cover on its side and what do you see?.

Doh!

11.7.05
Rick Kahn says:

I am listening to Aerial right now for about the 15th time. I will go on record here as saying this is one of the 100 best rock/alternative or whatever albums ever produced. It is as good as Hounds Of Love and The Dreaming. I can just see the public response to this album being great as we get to hear very little real talent. Kate is one of a kind; so is this album.

Aerial is release Nov 6th in Europe, Nov 7th in North America. Go buy it because an album this important has not been released for over 20 years

11.10.05
richard says:

just opened track 6 side 2 – the one where kate sings with the bird song- with wavelab and the shapes of those bits look very similar to the cover , thus probability is it is birdsong, perhaps not even used in the album, if I can be arsed I’ll search the album for isolated snippets and check em out

11.12.05
Marc says:

Download this teaser file and all will be revealed. http://www.suspended-in-gaffa.com/kate/KateBushpreview.wmv

11.13.05
Steve says:

I read all these posts with interest! I love the way people are seeing this puzzle from various angles. There might possibly bee something that you’re all missing though. Keep looking….

11.17.05
pea hicks says:

hi there-

i’m guessing others have probably figured this out by now, but i haven’t done a comprehensive search on the web… anyway, i located the aerial cover waveform on the album itself. it’s at 37:28 in CD2 (or 3:18 into track 9). it is, of course, a birdsong. here’s a screen grab:

http://www.operazero.org/peamisc/bushbird.jpg

now, in this pic it doesn’t look 100% like what you see on the cover, because the waveform as shown on the cover is just the birdsong solo’d, so you see the entire waveform in sharper detail. on the album itself it has other sounds around it, so the finer details at the beginning and then end of the waveform are obscured. but when you listen to the actual sound, you can hear those finer details and sonically they match up with the visual waveform as it appears on the album cover.

anyway, just thought you’d like to know!

pea

11.22.05
Joe says:

Great stuff – fantastic to read the article and then all the comments and actually be rewarded with hearing the waveform and having the puzzle solved, thanks to Marc, three posts above.

And I’m not convinced by the aerial – antenna theory. Aerial as in ‘from the air’ seems more in keeping with the album’s themes.

I love the album. Who else will sing, in earnest, the words ‘washing machine’?

Joe

11.23.05
emile says:

You should play it faster. I tuned it up little bit, sounded more like a bird.

2.7.06
Christie says:

fascinating stuff guys, I’m a big Kate fan and agree ‘aerial’ has connotations for a lot more than just an antenna. Read somewhere bout it being based on some old text – my mind is very foggy so sorry for the lack of clarity. Anyhoo great stuff, ya just gotta love her.
C

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