playwave: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/playwave - from package: SDL_mixer

You may install the required package with command yum install {package}

Error in other languages:
playwave: bevel nie gevind nie
playwave: comandă negăsită
playwave: comando não encontrado
playwave: commande introuvable
playwave: command not found
playwave: käsku ei ole
playwave: không tìm thấy lệnh
playwave: komanda nerasta
playwave: Kommando nicht gefunden.
playwave: kommandot finns inte
playwave: komut yok
playwave: nie znaleziono polecenia
playwave: níor aimsíodh an t-ordú
playwave: no se encontró la orden
playwave: no s'ha trobat l'ordre
playwave: opdracht niet gevonden
playwave: parancs nem található
playwave: perintah tidak ditemukan
playwave: príkaz nenájdený
playwave: příkaz nenalezen
playwave: команда не найдена
playwave: командата не е открита
playwave: 命令找不到
playwave: コマンドが見つかりません