# Powershell, 184 bytes

<!-- language-all: lang-powershell -->

*Inspired by Joey's [answer](https://codegolf.stackexchange.com/a/2621/80745).*

    (-split'14 4111 4141 411 1 1141 441 1111 11 1444 414 1411 44 41 444 1441 4414 141 111 4 114 1114 144 4114 4144 4411')[$args[0][0]-65]|% t*y|%{[Console]::Beep(880,200*"$_")
    sleep -m 70}

Test script:

    $f = {

    (-split'14 4111 4141 411 1 1141 441 1111 11 1444 414 1411 44 41 444 1441 4414 141 111 4 114 1114 144 4114 4144 4411')[$args[0][0]-65]|% t*y|%{[Console]::Beep(880,200*"$_")
    sleep -m 70}

    }

    &$f "A"
    sleep -m 700
    &$f "B"

I used a [timing setup](https://en.wikipedia.org/wiki/Morse_code#Representation,_timing,_and_speeds) for beginers:

* the `dot duration` is 200ms
* the `gap between elements` is less then `dot duration` (70 ms)
* the `dash duration` is 4 `dot durations`