Making Visuals with Sound
After researching TraceLoops I wanted to look at other processes that he’s explored, this is where I came across his oscilloscope drawings. To begin with I didn’t think these drawings were made on the oscilloscope, as I had no idea that it was possible to do. The images on the oscilloscope are made with sound, and different wavelengths change the lines on the screen meaning if you change the wavelengths in a certain way you can create either still images, or looped animations with sound.
I thought that it would be interesting to try an use sound to reanimate skateboarding using sound to make animations. So I started looking at ways that I could create visuals with sound, searching possible ways to turn sound into something that can be seen.
Then I came across a video on Youtube which uses a laser pointer to visualise sound. Using a tin can with both sides removed and with a balloon stretched over one side, with a small mirror on it. Then sound so put through the back of the can which makes the balloon on the can vibrate moving the mirror at different angles reacting to the sound push against the balloon. So if you have a laser pointer aiming at the mirror on the balloon the light with be reflected then would move according to how the bass and pitch change. Essentially showing a 2D representation of acoustic waves on the wall in front of the mirror. Depending on the sound a variety of patterns are made.
So I decide to experiment with this to see first hand how it worked. First putting together the can, I isolated a room from light then put sound through the back of it using a speaker. Starting by using a Stylophone playing single notes at a time, it wasn’t as effect as I hoped it would of been but I think it’s due to the volume of the speaker. At the time I only had a little speaker to hand, where as in the video I saw on Youtube the guy had an amp pumping sound into the back of the can. So if I had this equipment to hand it should of had a similar result. It still worked we but just not on the same scale as the original video that inspired me.
Thinking about what I had to work with I thought would there be a difference if I played more than single notes through the speaker so I put songs on hoping that the constantly changing pitch would effect the shape of the and size of the acoustic waves. Flicking through a variety of music genres seeing how they each reacted on the wall. I found that songs with a lot of drums and bass effected the movement of the laser more than anything else, but the size of the wavelengths was still a bit disappointing.
At this point I know that the only way I could increase the size of them was to use something which could push more sound through the speaker. I went to pack it up and when I moved the can I noticed that on the wall that it moved very franticly. Then I realised tapping the can distresses the balloon moving the mirror a lot more than the speaker ever did. I think it’s because I directly impacted the can making it vibrate and move more than the sound could do by just playing into the tube. This made me think about trying to use the can similar to a percussion instrument taping or hitting it in different way to make different visuals with the laser pen. It creates larger acoustic waves but they weren't constant as the impact isn’t constant like a note is restricting the duration of the visual, where as a note would be constant.
It would interesting to see if I could use the sound of skateboarding to try and create visuals with the laser pen making a direct like between skateboarding and perceivable graphics. I would have to record the sound and play it through an amp for it to have a big impact otherwise it would be like the experiments I’ve already done, very small scale. So it would depend on if I could get the equipment to do so.
Though it was small scale it got a good react from peers as they were fascinated by how the patterns of light change on the wall and wanted to also see what effected the movement of the laser. Even without them even saying anything to me the feedback was positive as they were automatically engaged by the movement of the light.
A definite limit of this experiment was the size of the wavelength but for the future I know that the size can be increased I just need a more powerful speaker to do so. I feel the potentials are huge depending on the how I use this process. I could set multiple cans and lasers to see how they react over each other how the sizes would be effected how I could change the sizes through out etc. There’s so much to explore but it’s just a matter of time, space and money.
I think overall the experiment went really well as I was able to test and see what effected the light the most or if it was effected in any certain was showing the advantages and disadvantages to each process I tried. Allowing me to have a more direct approach in the future as I have more understanding of how I can manipulate light and sound. My results may have not been the same as the video that inspired me but I feel like I have learnt more with trial and error to create successful graphics with light and sound. There are alternative ways that I could visualise sound but I don’t have the things I would need to create them.
If I have the time to I’d like to see if I could look at any other processes to translate sound to light, or maybe light to skateboarding in general.
https://academo.org/demos/virtual-oscilloscope/
https://www.youtube.com/watch?v=RxzMzSZF_b4
https://www.instagram.com/p/BCrojSyELz_/?taken-by=traceloops