alsa_record_playback: 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/lib/plainbox-providers-1/checkbox/bin/alsa_record_playback - from package: plainbox-provider-checkbox

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

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