dpbsmith asks: "Singing magnets are available at all of the usual geek-toy emporia, and, for all I know, ordinary toy emporia as well. They consist of a pair of magnets made of a polished substance with the general appearance of hematite. What is surprising, pleasing, and unexpected is that when the magnets strike each other under their own power, they produce a sharp, loud buzz that rises in pitch. The sound lasts a good fraction of a second and climbs somewhere into what sounds like the 200-500 Hz range. The exact sound and its duration are somewhat unpredictable and depend on how the magnets happen to strike each other. It is a little like the sound that you get when you mash a pingpong ball against a pingpong table with a paddle. What physics are involved in the production of these sounds?"

RexDart asks: "I'm building a new AMD64/939 box and would like to build into the system: capabilities to capture video from analog and digital sources; edit; add text and overlays; and maybe do the occasional DVE. This is for home movies, wedding videos and occasional project for work. This will be a dual boot Linux (Red Hat or Ubuntu most likely) / WinXP system. Open source, free, software would be ideal (Audacity will definitely be installed), but commercial solutions are not out of the picture. I'd like to keep the media production on the Linux side of the system and reserve WinXP for gaming, but is Linux up to the task?"

WeAz writes "According to an article via Yahoo's news service, Sony is reporting that they have sold 800,000 PSP units since the system's release last month. Demand for the system is so strong that there's already a shortage arising. To combat this, Sony 'would increase monthly PSP production by 100,000 units to one million in April, as it prepared to launch the product in the United States and Europe.' Ken Kutaragi, Sony Computer Entertainment's CEO said that monthly production of the PSP will eventually rise to 3 million units."

Xphox wonders: "Recently we have been referred to an outsourcing company to finish customization on a script that the author had no time to complete. Everything was going fine until recently. At what point do you consider they may have just ripped you off, and how do you know when to file complaints and withhold payment?"

Karamchand asks: "Free Software and open standards are ubiquitous in the server and even desktop area. But why does nobody seem to care about openness in digital cameras? I couldn't find a single hint as to what main processor my camera uses (I guess many use ARMs and others use TI DSPs), and while searching for information about (re-)programming digital cameras, I had to give up (apart from the scriptable Digita OS which was used by some discontinued cameras by Kodak, HP et al). Do you know of any efforts in this direction, whether they are actual disassembling/programming of cameras or asking vendors to get more open?" I still have my Kodak DIGITA-based camera from several years ago and I loved the flexibility, even though the performance is poor by today's standards (long cycle times, poor battery life, etc). Why are digital camera manufacturers keeping the lid on the capabilities of their products, when digital cameras could be so much more than their film-based counterparts?

Ben Rothke writes "When most people think of forensics, television shows like Quincy and CSI come to mind. Where such shows deviate from reality is the unrealistic speed at which the actors are able to identify, apprehend and prosecute the perpetrators. In the real world, (unlike television, where the crime must be solved by the end of the family hour), crimes are solved with slow, deliberate and methodical steps. The prodigious incidence of digital crime has elevated computer forensics to a critical role within the field of information security. The focus of computer forensics is twofold: first is the attempt to determine whether a breach has occurred and to stop the perpetrator; second is prosecution of the offender, if the breach was a criminal activity." Read on for Rothke's review of Forensic Discovery.

An anonymous reader asks: "My company wants to increase creativity and innovation, we our thinking of implementing a Google like policy of 20% of your time for independent projects but I can't find any details on how Google actually implements this. I am curious how they divvy up their time (1 day a week or 1 week a month)? How do you keep your real project from impacting it? At what point are the projects reviewed? Has anybody experienced other successful ways to stimulate creativity at their workplace?"

cgTobi writes "I am very pleased to announce that the stable 1.0 release of Aqsis - The Open Source Renderman Renderer, has been released. This release will remain stable in terms of publicly visible interface, no new features, only bug fixes. This will allow users who have been concerned in the past about things changing underneath them to use Aqsis in the confidence that it will not change. We have branched the CVS repository to allow 1.0 to be maintained in terms of bug fixes, while work goes ahead on new exciting features, including performance and memory optimisation, ray tracing/global illumination, and deep shadow maps."