DAC+ADC pro, no output

raspberry  pi OS last version

DAC+ADC pro new (two boards tested)

Software: Gnuradio 3.10

configuration 1:

output connected to input by straps

Result: no signal on the input, input led and output led on

Configuration 2:

jack from rasperry pi4 to jack DAC+ADC pro, standard audio out to RPi jack

Result: playing music is ok at the input of the hifiberry

Have you an idea of whath could be wrong?

(2 boards tested, same result, various configuration in ALSA for input)


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