Any phrases enclosed in square brackets  will be interpreted as 'beep syntax', a small language
to play sounds and melodies.
Beep syntax can be embeded directly into the prompt, in combination with spoken text. Example:
To practice, a bot in our Discord channel will respond to !beep commands to generate an audio file.
You can also download the C source code beep.c and compile with
gcc beep.c -lm
: indicates duration. c:2 means two beats.
c3 means c in 3rd octave (~130hz)
c4 is middle c (~261 hz)
g4:2 means g in 4th octave held for 2 beats
[c4 c g g a5 a g4:2 f f e e d d c:2]
# for sharp, & for flat. c#4 is c sharp right above middle c.
Can also use numbers to indicate frequency in Hertz.
Nested bracket structure for durations.
Every item within bracket has equal duration.
Total length of the bracket is 1, can be adjusted with :x notation.
(c e g):0.5 is a triplet over 0.5 second duration
(c e g a):0.5 is four notes over 0.5 second duration
(c e (g a) (b c)):0.5 is quarter, quarter, eigth, eigth, eigth, eigth all over a 0.5 duration.
[ (c (d e) f (g a) c):2 ((c e g) (g e c)):1 c ]
Brackets can be repeated.
(c d e f):0.5*4 plays 'c d e f' four times in succession, each iteration is 0.5 seconds duration, for a total duration of 2 seconds.