No we're not talking about Dave Lee Travis!!

It stands for Digital Linear Tape and it is a magnetic tape storage device. Using DLT technology ensures that your DVDs are exact copies of the approved project. Professionally authored pressed DVDs from a DLT are compatible with the widest possible range of PCs, MACs and set top DVD players.

Burnt discs can vary in grade and quality and can have compatibility issues with DVD players. So, when a project is replicated from a burnt disc such as a DVD-R or DVD+R, the copies inherit the compatibility issues from the master.