Monarchy Audio DIP Classic Digital Interface Processor 44.1kHz Precision Clock. Reduces jitter and is said to clean up the digital signal. The digital Inputs are TosLink (optical) and Coax/SPDIF (RCA) and digital Outputs are Coax/SPDIF (RCA) and AES/EBU. Light on front indicates lock to digital source signal. Remember, this DIP Classic works with 44.1k Hz digital source signals, not upsampled ones.