I was just watching an interview with Kurt Cobain and in it he shows the interviewer this device called a 'dream machine', and it consists of some goggles you put on which show images, some headphones which seem to emit a certain sound, and it has different settings on it for things like 'meditation', 'relaxation', creativity' etc. Has anyone ever since one of these before? The interview is from about 1992, I think, and I was only 10, so I don't remember such a device existing. Was it a prelude to those binaural beats things you get now? And does anyone use any of these devices to aid meditation, relaxation etc. and does it help them?