sndfile-generate-chirp: 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/sndfile-generate-chirp - from package: sndfile-tools

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

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