[sdiy] How to use an analog time-domain multiplexer?

[cheater cheater]

Switches like the 4067 have the bandwidth to pull 16 audio channels
through one wire, but it's not entirely clear to me how to use them
correctly. I roughly know that I need to have a band limiting filter
before the analog switch, then i need a level shifter / line driver,
then the signal goes into a cable, then there's a receiving buffer /
level shifter, then the other switch, and then possibly an s&h and
reconstructing filter. However, I just don't know that much about how
this should be done.

For example, I don't really know much about the S&H / reconstructing
filter part. Isn't the signal coming out of the switch basically a
multiplication of two signals: (desired audio) * (gate), where the
gate happens at 1/16 the switching frequency. Looking at data sheets,
the Nexperia part seems to have a t_on and t_off of roughly 60 ms
each, meaning it can switch at ~ 8.33 MHz; so one channel would be
sampled at 520 kHz. Given that the channel only /contains/ 22 kHz
audio, wouldn't (desired audio) * (gate) only contain two frequency
bands? one's at 0-22 kHz (the desired audio) and an alias around 520
kHz. 520/22 = 23.6.., So wouldn't reconstruction be as simple as
putting down a simple 2nd-order filter at 25 kHz?

Of course you don't want to run at 8 MHz if not necessary, so maybe
the switching frequency could be lowered to 4 or 2 MHz, but a filter
could still easily separate the desired audio with the aliases.

Am I on the right track here?

Regarding line drivers... what sort of problems could I run into here?
I understand I'd need to look at the GBW of the op amp and make sure
it fits what I'm doing, but other than that?

I'd like to run this signal over a normal mini jack cable - so I'm not
sure if this requires any special massaging.

BTW, is it a good idea to run the analog switches using Gray code, or
is sequential selection better?