Hi, I'm currently in the bootstrap phase of compiling a database of impulse responses of common end-user microphones (specifically those on headsets). With this, it is in theory possible to correct some of the aspects of the microphones, processing the signal to be closer to that of a studio microphone. The motivation is simple; no matter how expensive and perfect my headset is, everything still sounds like crap if the user at the other end has a $15 headset. The current idea is detailed at http://mumble.sourceforge.net/MicrophoneDatabase (along with a few issues we could use help with). Assuming the owners of the acoustics lab agrees, I plan to publish the recordings under the BSD license along with some simple matlab/octave code to create a inverse filter (and the C code to apply it at runtime). If anyone here has some suggestions or ideas (or want to send us headsets to test), I'd love to hear it :) Best Regards, Thorvald