deltapnl.dll is a Delta Panel Interface
belonging to M Audio Delta Control Panel Interface
from Doug Fetter Software Wizardry
Non-system processes like deltapnl.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.