Unfortunately I don't have a link since I don't remember the name of the device or company, but I read about such a device that was using five lasers to do the

Unfortunately I don't have a link since I don't remember the name of the device or company, but I read about such a device that was using five lasers to do the tracking etc. The problem with this tech was that it was too accurate and would reproduce every tiny particle of dust in the groove as audible cracks or pops, where the traditional stylus would just have pushed the particle out of its way.