I'm working on a software where I need to perform beat onset detection of audio tracks so the end result is something like the obstacles / beats in Audiosurf or Guitar Hero: frequency spectrum split in N bands and sudden spikes in the frequency are manifested as some kind objects.
I'm looking for a software with which I could easily visualize the frequency spectrum (as in FFT as a window function, not the frequency spectrum of the whole song) with the ability to export it.
The best I found is Adobe Audition where the spectrum is really awesomely generated, but it cannot be exported (either to an uncompressed image so I can process the pixels afterwards, or to some raw binary file).
I did implement a primitive onset detection in C++, but I wouldn't hassle with it long-long hours if there's a ready, more sophisticated solution.
Any help would be greatly appreciated.