[Freeswitch-users] How to stop the playback files

Dear All, I have played the list of voice files in playback like the following by using ESL perl module, $conn->execute("set","playback_delimiter=!"); $conn->execute("set","playback_sleep_val=100"); $conn->playback($sound_path."ivr/ivr-welcome_to_freeswitch.wav!ivr/ivr-this_ivr_will_let_you_test_features.wav!ivr/ivr-you_may_exit_by_hanging_up.wav"); In a loop I am checking the DTMF event, if that event comes I should stop the above palyback. How can I do it? Regards, Velusamy.