I've also dreamed about such a thing, which would open new worlds for performance and composition. I think the technology isn't even remotely close to allowing

I've also dreamed about such a thing, which would open new worlds for performance and composition. I think the technology isn't even remotely close to allowing this, though. The closest I can think of is research that has been done where MRI imaging and analysis were used to reconstruct images being watched by a subject. Results were very rough, though: http://news.berkeley.edu/2011/09/22/brain-movies/ http://news.berkeley.edu/2011/09/22/brain-movies/ And you have to consider that nonexistent music playing in your head has a special "unfinished" quality that might make it impossible to just translate into sound. My take is that when you process sound, it goes through multiple layers or depths of analysis, and imagined music takes place at an already deep level of analysis - could be very problematic for this project.