Delay Done Right Think of your favorite delay sounds and chances are it's a TC sound. Our delays are the industry standard, and our 2290 Dynamic Digital Delay is one of the most coveted pieces of gear out there today. We know and love delay, and have made sure Flashback X4 delivers the legendary TC quality at every turn. From the awesome digital 2290 sounds to beautiful analog tape echoes and more exotic vibes of a reverse delay, Flashback X4 delivers every delay sound under the sun - past, present and future.