The SACD format saves the music in DSD (Direct Stream Digital Format).
Neither the Klangbar nor most surround receivers can handle this. Here the sound output for SACD must be set to PCM. So far, it has not been possible to prove that the DSD is fundamentally superior to the PCM format.
For the other sound formats such as Atmos, DTS, etc., the Bluray players can be set to Bitstream.