I'm a month late to the party here but to:
jazzman7 and @monowatcher,
Clock source can depend on the DAC. Maybe not normal synchronous I2s protocol but according to my Owners Manual for Pointus II, "incoming signals are all stored, buffered, and re-clocked using the DAC internal clock".
So without a streamer, using USB from a MB Pro M3, streamed RadioParadise or ripped CDs, sound is very good (would probably be better with a DDC), but noticeably better is I2s directly from an OPPO 83 to the Pontus, whether 16/44.1, 24/196, or SACD.