Hearing the Ocean Ripple and Crystalize Filters

Posted on January 29, 2009 by John CS Keston

No, this is not the answer to a “before and after” puzzle in an episode of Wheel of Fortune. They are two of many Photoshop filters. These sound files are the rejects. Although not bad, I did not find the effect these filters had on my electric piano passage as interesting as the rest of my experiments. They also sound very similar to each other, which might not be the case using different sounds, or with other settings. Anyway, this is it for my first round of using Photoshop filters to process audio. Next time I plan on trying this with some more natural, acoustic sounds.

Crystalized Electric Piano

Ocean Ripple Electric Piano

Obliterating Audio with Photoshop

Posted on January 27, 2009 by John CS Keston

So far my examples of Processing Sound Using Photoshop have been recognizable in comparison to the original versions. In my initial experiments my intent was to apply subtle changes as a reference. However, it’s interesting to hear what happens without restraint. Here I applied the Wave filter, which in many respects is analogous to sound. For example, you can assign a sine, square, or triangle wave to process the image. This filter changes the sound so dramatically that you might very well get similar results from altogether different sound sources. Imagine an ensemble of people wobbling sheets of flexible material in sync with each other.

Wave Electric Piano Pattern

Gaussian Blur

Posted on January 26, 2009 by John CS Keston

Gaussian blur was the first Photoshop filter I tried applying to sound. I was not sure what to expect. I imagined the signal might be distorted or over-driven in some way. A Gaussian blur is created by applying a Gaussian function, which is also used in statistics for normal distribution. Instead of hearing distortion, the audio, to my ears, actually sounds blurred. The effect is like a chorus, but the envelope is less clear. The attack of each note seems slower or spread out while the frequency is blended or even slightly warbled. All in all a pleasantly surprising experiment.

Gaussian Blurred Electric Piano Pattern

Liquefied

Posted on January 25, 2009 by John CS Keston

Once again, here’s the same electric piano from Processing Sound Using Photoshop. This time is has been liquefied by the Photoshop filter of the same name. Liquefy is nice because is relies on the human element of dragging through the image to warp it in the direction the mouse pointer is moved. I purposefully did not liquefy short sections of the waveform so I could compare the original signal and the manipulated one.

Liquified Electric Piano Pattern

Spherized

Posted on January 24, 2009 by John CS Keston

The Spherize filter in Photoshop is designed to force an image to bubble outward as if wrapping it around a sphere. Can you imagine what it would sound like to warp audio in the same fashion? I imagined that that the frequency would warp downward as the waveform was stretched and then back up to the original pitch on the opposite side.

Well, that’s almost exactly what happened, although I didn’t expect it to sound as deep and eerie as it does. For this entry I have shortened the image horizontally to emphasize what the filter actually did. I also lightened the image to make it more visible. It looks a bit like a zeppelin whereas the original image of the sound was flat. Please enjoy the Spherized version of the loop from the last entry.

Spherize Electric Piano Pattern