EchoHacks Speech Trainer – Dual Input Training with Netbook We will be demonstrating the Dual Input Training Method. This is the method for users who prefer to play the media files on a separate device such as a netbook. For this method, the user must have two headsets. First, take one hear piece from the phone headset and place it in one ear. Connect the second headset to the netbook, and place one earpiece in the other ear. Run the app and start training.