Tag Archives: PCM-D50

Bobcat Jackhammer Attachment

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Wednesday, April 22, 2009 was a beautifully sunny day in Minneapolis. This quarter my schedule includes a three hour break, which I usually use for catching up on curriculum, ACB entries or meeting with students, but this time I let Spring fever take hold and got on my bike a rode around one of my favorite city lakes. There’s a nice spot on the lake where I sometimes read or take an afternoon nap. Unfortunately just across the lake from my spot was a work crew using a jackhammer to break up a cement driveway. If you can’t beat ‘um, join ‘um right? Having my PCM-D50 along, I finally gave up on the idea of a few Zs and rode over to the action to make a recording. It took a minute to get the levels right, but I think they were going to be at it all day, so there was plenty of time for a good long recording. Here’s a few passes of the jackhammer engaged and splitting concrete.

Bobcat Jackhammer

GMS Videos and Interface

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Today I made two more videos with the GMS using a different technique than in Dodger of Red Lights. This time I wanted to explore what could be produced using visual input that I wasn’t directly controlling. The obvious, albeit cheesy, lava lamp came to mind, so I turned it on and went to work.

I connected a separate video camera via firewire, leaving a screen with all my interface controls available for me to tweak while recording. I recorded the video to MiniDV on the external camera, and as before recorded the output onto my PCM-D50 to free up the CPU for Reason and the GMS. Since I was recording the video on the external camera I had to the flip the video so that the image corresponded properly with the sound. This led me add a feature for toggling the mirroring in the GMS.

Click the image to see a full sized screen shot of the interface. All three videos are available on the Unearthed Music Vimeo account. Here’s an excerpt of audio from the piece titled Sound Globules.

GMS: Sound Globules

GMS Piece: Dodger of Red Lights

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Today I decided to see if I could create a version of what I performed at the MAW outing last night, as a streaming video with good quality sound. I opted not to use screen capture software so that all the processing on my Macbook Pro could go into rendering the images and sound. The imagery was created by manipulating a red, LED, bike light near the lens of the camera. The screen was then shot with a second camera while the audio was recorded externally using my PCM-D50.

I built a pentatonic scale using the note probability distribution feature in the GMS. The most likely note was a C followed by D, G, G#, and then B natural. I also used the probability distributions on the durations to get some stumbling rhythms centered around sixteenth notes.

Dodger of Red Lights from Unearthed Music on Vimeo.

MAW Kids on Bikes

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Thursday was my first outing with Minneapolis Art on Wheels (MAW) and my first opportunity to project my work on the GMS in a public space. The sheer scope of the event was impressive. My friend Kevin could hardly believe all of the equipment that was transported by bicycles to the location. There was some really good work on display, some bizarre random events, and exhaustive video documentation that I expect we’ll see on MAW soon.

After the outing, on the ride back to base, everyone was giddy from the nice weather. We get a bit cooped up during the long Minnesota Winters. In not one of my finest cases of judgment I decided to dig out my PCM-D50 from its protective case and record the proceedings while riding my bike. I don’t necessarily recommend this sort of behavior, but I held on tight and threw caution to the wind. Here’s a segment of audio from the bike ride back.

MAW Kids on Bikes