Hi there, I would like to know what is the preferred way to do the following. My application is this: Make a phone call to a person, after the person picks up the phone an message would play. If he presses the * key, the message would stop and start from the beginning again. I am using C# to start the call and play an audio using PlayAndGetDigits() while in my C++ code would check the DTMF event. If it finds a * key pressed, it will call the uuid_displace with the same file (but for testing purpose, I am using different file). This is not working right because I can hear that the new audio file is playing on top of the original audio instead of stopping the original audio and play the new audio. Anyone has an idea how I should do this? Thanks in advance. Frankie