Topic: DIGICheck 0.73 on macOS 10.14.5 shows no data recorded by ADI-2 DAC
Disclaimer: I have already contacted the RME support about this almost a month ago but after receiving back a reference to the manual (5.6 on p. 10) which did not resolve the problem, I have not heard back.
Below is a slightly adapted description of the problem I have sent to the RME support (additions marked in italics).
DIGICheck does not show the data being recorded by the DAC. The OS' and QuickTime Player's recording function show that a signal of expected amplitude is present at the SPDIF input/USB output of the DAC.
DIGICheck shows the DAC as an available input device but regardless of the signal, the BitStatistic shows all zeroes while the DAC's State Overview shows 16 or 24 bits and any DIGICheck meter is all black/dark or reads UFL. Still, DIGICheck sets the spectrum analyser according to the sample rate of the DAC's internal clock (set in Audio MIDI Setup -> Audio Devices).
Whether the DAC's input is set as 'Source: Optical' or 'Source: USB (Rec. opt.)' has no influence on the above behaviour.
Signal flow: MacBook Pro (Retina, 13-inch, Early 2015, macOS 10.14.5) -> SPDIF optical -> ADI-2 DAC (FW 26/28 or FW26/30) -> USB -> MacBook Pro (same unit).
DIGICheck is version 0.73.