Question about how analog audio recording works

I've wondered this same thing about speakers. How does a single driver replicate sounds of different freq. at the same time without stepping on itself and smearing one or the other? 

@dweller Full range drivers are not an example. They fall all over themselves all the time due to breakups and something called the Doppler Effect. Finally, 'full range' drivers don't exist. All of them will need a subwoofer and a tweeter (to fix beamy-ness); in essence 'wide range midrange driver' is a far more accurate description.

The ideal Freq. range for a midrange is 200-2000HZ (range covered by the human, singing, voice). How can a physical object vibrate at both 200HZ and 2000Hz? I know it's true, I just don't know how. And that's O.K....

Compact discs do not have 1's and 0's embedded in the polycarbonate. CDs have a series of pits on an aluminum layer arrayed in a spiral pattern. A red laser follows the spiral groove from the center outward. The reflected laser light is read by a photo detector which converts the light into varying voltages according to intensity. The data on the CD is encoded by the different distances between the pits. These distances are called "lands". A transition between a pit and a land can be either a 0 or a 1. It is the transition between pits and lands that is the basis of optical data encoding.

@atmasphere ​​​​​: The Lincoln Walsh speaker is the closest to being a full-range driver of all the dynamic (moving voice coil in a magnetic gap) speakers. It does have a problem with frequencies above 8khz being down in level compared to the midrange. John Strohbeen at Ohm in Brooklyn added an upward-firing dome tweeter atop the Walsh cone crossed over at 8khz to compensate for this. I think this is a successful approach! I have a pair of the older Sound Cylinders and they do sound spectacular!

@dweller how can air transmit multiple frequencies at once?