# Discussions→ Fourier Transformations

• #### Fourier Transformations

I've become very interested in the translation of sound into image and image into sound. Recently I've been using a programme called "Bitmaps And Waves" or BW.exe coded by Victor "X" Khashchanskiy ( http://www.elisanet.fi/victorx/#softw ) which applies a Fourier Transformation ( http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/OWENS/LECT4/node2.html ) to translate from the pixels in the image to the sound samples in the wav. The virtue of this method is that it's a true mathematical relationship and so it works both ways. That is to say, when the reverse process is applied to the image produced from the sound it reconstructs the exact same sound.

When some change is made to the image, such as a resize or a photoshop effect, turning that image back into the sound carries with it the mathematical distortion and thus changes the sound.

As an experiment I converted all of the tracks from the "Kitchen Sink" album into wavs and then used BW.exe to create bitmap images of them. Then I resized all 14 images to a uniform size (640x480 pixels) and then turned them back into wavs. Finally I converted the wavs to mp3s and uploaded them to last.fm. (As I write this I'm still waiting for some of them to upload - a last.fm glitch is blocking some of the uploads).

Here are the images created from the tracks:

• The original 19003ultimissimeregistrazioni track creates this image:

which I then resized to 640x480 pixels:

which, when translated back into sound, gives this result:

19003ultimissimeregistrazioni-2

• OK, I know, this is a little off topic. These are mathematical operations rather than chance occurences. However, they are mathematical transformations applied to sounds which began with an element of chance in their selection.

• One of the effects of resizing the images before conversion back to sound is that the resulting sounds are all the same length: 14 seconds.

• Another effect is the transformation of the tones in each recording so that they all sound more uniform, though not exactly so.

• It would also be possible to apply a vast range of photoshop effects before converting the images back to sound. The Fourier equation ensures that the same type of effect is reproduced in audio, even if it's something like a whirlpool or an "oil painting" effect.

• very intriguing, these tracks should be on the kitchen sunk album, i was thinking how since tracks only scrobble at 30 seconds maybe these tracks could be looped once or twice or a few of them stacked so to speak? let me know which ones to add to the album.

Miles Bachman
• Maybe we should start another album where the tracks are created from images we have made by painting, drawing, taking photos, etc.

• sounds (?) good.

Miles Bachman
• Maybe we should start another album where the tracks are created from images we have made by painting, drawing, taking photos, etc.

Yes!!

• I am in

beth aven