sound_dump: 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/sound_dump - from package: libbluray

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

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