list_audio_tracks: 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/list_audio_tracks - from package: icedax

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

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