A simple sequential playlist to change playing music every 3 minutes or by key-press (looking for making shuffle)

play.sh

#!/bin/bash

MAXTIME=180
PLAYER=/your/path/here/pge_musplay
PLAYDIR=$PWD/*.mid

ord() {
  LC_CTYPE=C printf '%d' "'$1"
}

for f in $PLAYDIR; do 
  echo "================================================================================"
  echo "PLAY $f..."
  $PLAYER "$f";
  echo "================================================================================"
  TIME="0"
  echo
  while [ $TIME != $MAXTIME ];
  do
    printf "\e[33m\r$TIME/$MAXTIME\e[0m"
    if read -r -s -n 1 -t 1 key
    then
        Akey=$(ord $key)
        if ((Akey == 112)) ; then
            printf "\rpaused"
            read -n 1
            printf "\r             "
        else
            TIME=$MAXTIME
        fi
    else
        TIME=$(($TIME+1))
    fi
  done
  printf "\r                  "
  sleep 1s
  printf "\n\n"
done