Hi guys, There is a little typo in this page: https://freeswitch.org/confluence/display/FREESWITCH/Lua+API+Reference session:execute session:execute(app, data) local mySound = "/usr/local/freeswitch/sounds/music/16000/partita-no-3-in-e-major-bwv-1006-1-preludio.wav" session:execute("playback", mySound) NOTE: Callbacks (DTMF and friends) CAN NOT EXECUTE during an execute. session:executeString session:execute(api_string) *<<<< Shouldn't this be executeString???* local mySound = "/usr/local/freeswitch/sounds/music/16000/partita-no-3-in-e-major-bwv-1006-1-preludio.wav" session:executeString("playback "..mySound) Note: Callbacks (DTMF and friends) CAN NOT EXECUTE during an execute. Can anybody update it please? Can lead to confusion. Thanks! Joel.