recwav: 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 Debian possible default full paths are:

/usr/bin/recwav - from package: vpb-utils

You may install the required package with command apt-get install {package}

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