Some research topics and project ideas for Fall 2010. Originally posted September 25, 2010 Wave field synthesis (thesis topic) desktop line array construction 96 driver modular array construction incorporate source directivity in software simulation FEM or parametric simulation with parallel acceleration (jCUDA); Java applet for visualizing loudspeaker array acoustic wave field, "wave box" Low-latency touch […]
PADsynth in MATLAB
Update, February 15, 2019: Try PADsynth in your browser. PADsynth is a synthesis technique that generates a lush sound with a simple algorithm. The algorithm begins with additive synthesis, where you build a timbre with a sine wave at the fundamental and each overtone. A frequency magnitude plot of this would show several thin spikes. […]
Loudspeaker Array Simulation
This is a simple acoustic beam steering simulation built in Processing/Java. The simulation has physical correspondence; it runs at 1/2000th realtime and at a scale of 10 pixels = 1 meter. The array size is fixed at 2.5 meters (25 pixels tall), positioned at the left edge of the display region. More at HRTF and […]
A note to Digsby developers: Fix file transfers
Re: Digsby Blog - Striving for Perfection No Gtalk File Transfer = No Perfection. In order to revolutionize chat, Digsby must create a working file transfer solution for Gtalk. Trillian, Meebo, Adium. Many have attempted and many have Failed to answer the call for cross-protocol Instant File Sharing. Some more miserably than others. Whoever can […]
Wave Field Synthesis speakers
The first batch of 25 speakers for the WFS array has arrived. These will go into a mini-array configuration for testing nearfield listening. I bought these 4 ohm, 2" drivers from a distributor that happens to be in southern Florida.
4D Wave Field Synthesis
If you surround a listener with a great sphere of loudspeakers at a fixed distance, it should be trivial to produce a virtual source at any direction. What isn't trivial is producing a virtual source at an arbitrary distance, since the loudspeaker positions are fixed at a given distance from the listener. It could be […]
Hacking Picasa Web Album URLs
I was messing around with Picasa Web Albums trying to get an embed URL for an image at just the right size. It turns out you can do some weird stuff just by messing around with the URL. Here's the format: http://[photo server].com/[unique image code]/[options]/[image name].jpg You can tweak the options to your liking and […]
How to Fix: DVI or VGA cable doesn't work
When you have a DVI or VGA cable that appears to be broken or a display showing weird colors, check the pins. Check to see that there are no bent pins, and that there are no sunk pins that got pushed down into the housing. You'll need to gently pull them back up with a […]