playwav: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/lib/debug/usr/bin/playwav - from package: libvpb-dbg
/usr/bin/playwav - from package: vpb-utils

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