This might be harder to find at a thrift store than at an electronics or hobby store, but there are a large number of ultra-small toy helicopters on the market that can be had for not a lot of dosh. They’re flimsy. They don’t fly well. But they do scare the hell out of family pets, which instantly makes them entertaining, and they do make pretty cool sounds.
So, imagine this: You’re only one person with no assistants nearby. These helicopters, well, they fly erratically. How do you keep a mic trained on it to get a good recording? I solved this problem before by putting wireless mics on moving objects, but they’re far to heavy for something like this. Well, let’s just take advantage of the toy’s weak flying ability: Why not just hold the stupid thing while the rotors rotate? The rotors, however, rotate really quickly, and move a surprising amount of air. The body of the helicopter is so teensy that I couldn’t find a good mic position that blocked the air being moved around, which of course creates a lot of distortion and rumble.
Rather than futz around with a bulky windscreen and furry windjammer, I decided to just attach a contact microphone to the helicopter with gaffer’s tape. This worked reasonably well, especially after a quick equalization adjustment to overcome the somewhat dull midrange response of the mic itself. The sound that was transmitted through the high-density foam body was actually more interesting and full than the rotor’s sound in the free air, anyway. Besides the aforementioned EQ pass, this recording is unaltered. Recorded at 192kHz, this could provide all manner of mechanical effects if pitched down or processed further!
[Contact microphone into Sound Devices 702 recorder]
Think about it: Wound metal string under tension, wooden resonator. That’s all a guitar really is. What a wooden gate lacks is thickness, like a guitar, but at more than a meter in width and height, that’s a broad-enough surface to send air molecules running for cover.
I had to rosin the hell out of the bow to make it tacky enough to grip this oversized “string.” I found that also spreading rosin on the wrapped steel cable was helpful. I tuned the cable, as much as one can, by adjusting a turnbuckle.
I recorded in mid-side stereo. Today’s sample features is comprised of one mono track totally dry, one mono track run through Michael Norris’ Spectral Blurring effect, one mono track pitch-shifted down by 1.5 octaves, and the one stereo track pitch-shifted down by three octaves. Recording at 192Hz helps for such tomfoolery.
I apologize to my neighbhors for the unholy racket that I’m sure they thought was a demonic violin 101 class.
[Sennheiser MKH 50 and MKH 30 recorded as mid-side stereo into Sound Devices 702 recorder]
I'm killing this platter slowly with a screwdriver, and it never sounded so good.
Nothing puts Moore’s Law in perspective like ripping an 80 gigabyte hard drive out of an enclosure and swapping with a 2 terabyte drive. 80GB isn’t even big enough to act as a Photoshop scratch disk in 2010.
It’s not new ground by any means, but I did get some pretty interesting results, ranging from IDM-like chirps and squeaks to all sorts of weird drive vocalizations when I slowed the platter down with a screwdriver – much to my surprise, the damn thing came to a stop, jittered around, and then spun right back up again. Most of the sounds were pretty subtle (perfect for the MKH 50), surprisingly, but with lots of surprises. [I shot video of the whole thing, a still of which can be seen above, but really, a hard drive spinning is not that interesting. Trust me on this one.]
I had a great time until Chuck Russom suggested on Twitter what might happen if the 7200rpm drive would have come loose…
These sounds have only been normalized and no sound processing has been applied.
[Sennheiser MKH 50 microphone into Sound Devices 702 recorder]
I'm now the proud owner of an NJ-1 Heavy Lifting Utility Unit!
I’m very excited to share a new audio recording: The first steps of my new NJ-1 Heavy Lifting Utility Unit (HLUU). The HLUU is a do-everything kind of robot, and I’m hoping to use it for landscaping and home improvement projects. It was a big purchase in a pretty down economy, but my significant other and I think it’s a solid long-term investment.
I was so excited that I had to grab my field recorder and document its first steps. The manual says to let it charge overnight and then calibrate its voice command recognition system, but I just couldn’t wait to just let ‘er rip. Unfortunately, that meant that it only took a few steps before losing power and automatically shutting down, so that’s why this clip is so short.
This puts my Roomba to shame. Check out the recording below and say hello to HLUU!
The sound of metal resonating, scraping, straining…doggone it, I just cannot get enough of this stuff.
Doing yardwork one weekend, I noticed my shovel made a great sound as I was scraping soil out of our wheelbarrow. So, naturally, I dragged my wheelbarrow inside our shed, put a large-condenser microphone over it, grabbed the shovel, and pushed its flat blade around the wheelbarrow in various shapes, with and without dirt, for about 20 minutes.
To me, the sounds were evocative of ancient portals, rusted ship doors opening and closing, or the hull of a ship groaning under pressure. What does it make you think of?
, recorded with 
