I made this recording half way across the Central Avenue bridge from Northeast Minneapolis, to the downtown area. This bridge crosses the Mississippi, which was virtually frozen over except for water flowing rapidly over stages of a lock and dam system.
Huge formations of ice were hanging over the falls collecting on logs caught in the flow. The stereo image of the recording consists of the raging river below on the left hand side and sparse traffic on the right. I used the built in mics on the PCM-D50 covered up with a nice fuzzy wind screen like a winter hat.
Central Avenue Bridge Recording
Listening on monitors or good quality phones will allow you to hear the deep tone created when I smacked my palm against the side of the rigid front fork from my Surly 1×1 single speed mountain bike. I captured this sound with my PCM-D50 using the built in mics. This was a quiet sound so I needed to record in a quiet space. 
During a recent family dinner at my brother’s house I was innocently admiring the ornaments in his home when came across a collection of musical snow globes. I could not resist winding up these devices for some concurrent chaotic music box sound. Fortunately I had my PCM-D50 on hand, so while no one was looking I gathered the snow globes and tried to find a quiet place in the house to make a recording. With the family event fully underway, this was not an easy proposition, but after wandering around for a few minutes I settled on recording them in the bathroom. Despite an odd look from my brother’s wife as I exited the bathroom the recording went well. 
I made a recording of this piercing high powered hand dryer in the bathroom at a local pub. My friend Joe helped by going through the hand drying motions as I held the PCM-D50 recorder to capture this beautifully obnoxious high frequency noise.
I recorded this freight train during a winter bike ride with a group of friends recently. We rode through deep snow, on frozen lakes, head first into snowbanks and all over the place. 
Tonight I’ve decided to share another of my first few Sony PCM-D50 test recordings. It is simply the sound of filling my bathroom sink partway with cold and then the rest of the way with hot water followed by the much quieter sound of the water draining down the plug hole. These sorts of mundane sounds are especially interesting to me once they have been recorded and taken out their context. Do we ever really listen to the sounds things make while we go about our daily lives? Probably not. And for good reason. If we were distracted by the qualities of the typical sounds in our environments we would never survive as a species. Our hearing is tuned to alert us when we hear irregular or unusual sounds. To my ears, ordinary sounds become extraordinary when I focus on listening to them.
Some people collect vials of sand from beaches they have visited, but I collect the sounds of the waves breaking on the shore. Well, it’s not much of a collection all I have so far is the 
I captured this very typical example of restaurant ambiance recently at my favorite neighborhood Thai place in Minneapolis. I’m still running the PCM-D50 through its paces, but I sense that I’ll be looking forward to a long and happy relationship. This one minute and seven second clip includes many of the usual sounds sounds of diners in a food establishment: talking, laughing, coughing, children, plates clinking, ice in drinks, footsteps of the servers, and take away being placed in paper bags.
One of the first few recordings I made with my Sony PCM-D50 was to capture traffic ambiance. This was really a pretty good test for the stereo imaging of the built in mics. I held the device, so there is some handling noise, although I did put a wind screen on the D50. This recording would have been impossible without it. The mics on the D50 are very sensitive to wind. Even indoors if an object, like a door, moves the air near the unprotected mics you will hear the capsules flapping in the breeze. Despite the wind screen you can hear a bit of wind noise around 00:34. The stereo image is acceptable, but it’s not as broad as other stereo mics I’ve used such as the Shure VP88. I have yet to try the 120 degree, Y pattern setting, which I imagine will spread the image considerably.