Raspa loopback doesn't work on Raspberry Pi 4 and hifiberry

Hi there,

we are testing raspa loopback demo on a Raspberry Pi 4 and hifiberry DAC+ ADC Pro, but we can’t hear any sound, and in the process callback, all input are zeros.

Please help, thanks!

BTW, the sushi program doesn’t work now:

sushi -r --multicore-processing=2 -c ~/config_files/mda-vst3-configs/config_mda_synth.json  
sushi: error while loading shared libraries: libcobalt.so.2: cannot open shared object file: No such file or directory

Which user are you running SUSHI with?

You need to point the LD_LIBRARY_PATH environment variable so that Xenomai’s libraries can be found (that’s the error you are getting). If you login as mind it’s done automatically by the BASH .profile script, otherwise check there how to do it if you need to run Sushi as another user.