🚀 go-pugleaf

In electronics everything is shrinking, what was musical computers is now
musical chips.

I was in my lab a couple of years ago adjusting the bit rate clock on a 
prototype LAN to see how fast it could go.  The limit was when flip-flops
inside to the protocol chip went meta-stable.  Detecting this condition was a
little difficult until I noticed that the FM radio in the lab would lock on to
the second harmonic of the bit rate.  I could track the bit rate by tuning the
radio as I increased the clock speed.  If all was going well, the radio had a
nice quiet null at the second harmonic.  When the meta-stability point was
reached, the null disappeared because the flip-flops were not changing in
unison and not enough signal was generated for the radio to capture.

An older story:
You don't need a radio or peripherals to get sound out of a computer.  All you
need is a large core that has bank set and reset capability.  Set and reset
half of the core at 100KHz.  Set and reset the other half of the core at
101KHz.  It is very difficult to locate the source of that 1KHz beat.
Of course, varying one of the frequencies varies the beat pitch.  We never
completed the task of modulating the pitch into speech.  Our goal was to have a
eerie voice come from within the memory saying "Help, I trapped in central
core".  Timing loops within timing loops to produce phonemes is difficult
(consonants are *very* difficult to make out of beat tones).