Uhm, I know this post is old and all, but I was actually just looking for this subject. See my sister's stereo has a blown left channel and it misses some nuances in music and film because of this. And I'd like to inform you, that, uhm, you're actually
wrong.
It may be standardized, bit it's not impossible to get mono from stereo.
Allow me to explain: A stereo signal is, in fact, made from two mono signals. Each of these signals carry different parts of the music, or slightly different or off-timed versions of the sound from the other channel. This creates what we in the music industry
call "a spread stereo effect".
See, we have panning for a very good reason. Let's say I was recording a guitar solo. Have you ever recorded yourself with a simple tape recorder or a semi-cheap (<$500) video camera?
If so, you probably sounded "flat". "Boring". Maybe you played great but the fact is, a good recording of a guitar is either recorded IN stereo, where two microphones pick up the difference between the left side and the right side; Or you add echo, stereo spread,
and delay through hardware or software.
And, one last note. A mono sound system can have as many speakers as you can plug into the driver. That could be 32, if you had a powerful enough amp setup. And they could all be run on mono. Or, alternatively, you could run 16 on the left as one big left channel,
and 16 on the right as one big right channel.
As software and hardware advances ever further, we grow in the ability to use more channels simultaneously. That's why 5.1 and 7.1 exist. It's all hardware that reads digital signals, and decodes them to send six or eight different speakers six or eight different
channels.
If you don't believe me, go to music technical school. They'll tell you the same thing I just did.