play Morse Code

[t-m-z]

https://en.wikipedia.org/wiki/Morse_code

International Morse code is composed of five elements:[1]: §3 

short mark, dot or dit ( ▄ ): "dit duration" is one time unit long long mark, dash or dah ( ▄▄▄ ): three time units long inter-element gap between the dits and dahs within a character: one dot duration or one unit long short gap (between letters): three time units long medium gap (between words): seven time units long (formerly five[6])

[S-Man42]

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