Morse 2

#!/bin/bash
# Filename: morse2.sh
# Version.: 03102017
# Author..: robz
# Enter words hear morse.

trap 'kill -9 $pid 2>/dev/null; echo; exit' TERM EXIT

declare -A morse
morse[A]=".-"     morse[B]="-..."   morse[C]="-.-."   morse[D]="-.."
morse[E]="."      morse[F]="..-."   morse[G]="--."    morse[H]="...."
morse[I]=".."     morse[J]=".---"   morse[K]="-.-"    morse[L]=".-.."
morse[M]="--"     morse[N]="-."     morse[O]="---"    morse[P]=".--."
morse[Q]="--.-"   morse[R]=".-."    morse[S]="..."    morse[T]="-"
morse[U]="..-"    morse[V]="...-"   morse[W]=".--"    morse[X]="-..-"
morse[Y]="-.--"   morse[Z]="--.."   morse[1]=".----"  morse[2]="..---"
morse[3]="...--"  morse[4]="....-"  morse[5]="....."  morse[6]="-...."
morse[7]="--..."  morse[8]="---.."  morse[9]="----."  morse[0]="-----"
morse[.]=".-.-.-" morse[,]="--..--" morse[?]="..--.."

while true; do
    read -p "Input a word or sentence: " input
    echo
    while read -n1 character; do
        character="${character^^}"
        if [ "$character" ]; then
            echo -ne " $character\t"
            while read -n1 dotdash; do
                tput bold
                [ "$dotdash" = "." ] && duration="0.2" || duration="0.4"
                echo -n "$dotdash"
                (speaker-test -t sine -f 400 >/dev/null) & pid="$!";\
                sleep "$duration"; kill -9 "$pid"
                tput sgr0
            done < <(echo -n "${morse[$character]}")
            sleep 0.2; echo
        else sleep 0.4; echo
        fi 2> /dev/null
    done < <(echo -n "$input")
    echo
done