I can't hear the first note that I play only the repeats from the delay. What is the problem with the Flashback X4 / Alter Ego X4?
This happens when your Flashback X4 / Alter Ego X4 is set to 'kill-dry on' mode. It should be set to 'kill-dry off'.
To solve this issue you will require a #10 Torx driver to remove the bottom plate to change this setting. Once inside you will see 2 dip switches. Make sure the second switch is in the downward position to allow the dry signal to pass through. Please see the diagram below.