I see you can connect RSA780 CD transport to the RS130 via USB.
Can RSA780 play the DSD layer of SACD?
In the case of SACD ISO sound sources, Rose devices process it like CD playback.
Since the ISO format is a CD Image standard for Rose devices, it enters CD playback mode and plays it as if playing a CD directly.
If you try to play another sound source while playing an SACD ISO sound source, a pop-up will appear that does not end CD playback.
If you want to listen to other music, end the SACD ISO sound source and play another sound source.
SACD ISO is not registered in the album even if media scanning is performed.
You can listen to it by directly selecting the desired ISO image from Music → Folder.
If you want to use it by registering it in an album, you must load the ISO image, rip it, and save it as a DSD file.
Why not answer the question from dtossan directly?
No, the RSA780 can only used for the CD layer. The only add is, that you can read with it MQA-CDs.