Hi, I have a very odd issues and looking for some help. I am using Master FS and had this issue before. I am making an outbound call from my program to my cell and playing an audio file. I am talking back in my phone to the audio file and found that The more I talked the more the audio breaks up. I stop talking and then the audio stops playing. I start talking and the audio starts playing where it left off. I am sure its not a packet loss as the audio file continues where it stop playing. I also have FS client open and do not see any errors. I can 100% reproduce this issue. I did try 3 ways to play the audio and different audio files. session.read session.PlayAndGetDigits session.StreamFile I tried a direct connect to me to a cisco switch and other voip routes. Anyone know if this is a bug maybe locking thread or a setting? Andrew