"I just tested an old USB interface (1.56 version driver on windows) with a Sierra OSX computer (Sierra version 10.12). Works fine. (I assume the DAC202USB of the customer has that version built in).
Then I updated to Sierra 10.12.1. After the update it did not work at first (no music). Then I changed the sampling rate in AudioMidi to a different value. Now it worked. Then I changed the sampling rate back to the initial value. It still kept working."
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