Can I connect a S/PDIF Optical signal to Quartet's Digital Inputs? Chris April 19, 2021 19:47 Updated Quartet's Optical Inputs only work with ADAT or SMUX devices. They do not accept S/PDIF Optical signals. Related articles Using Ensemble Thunderbolt with Quartet to expand inputs How do I play computer audio through Mini-Me SPDIF or AES digital outputs? How to setup and test optical inputs and outputs in Control for Element units How to change Analog Level via TouchScreen of Quartet Can Quartet lock to an ADAT/SMUX optical clock source? Comments 0 comments Article is closed for comments.