Good to know there's a new hdspm driver being worked on.
The settings of the card can nevertheless be
set, using alsamixer in the terminal.
I've only had limited success using alsamixer to change settings
on HDSPe MADI cards. I've found amixer and alsactl (both CLI)
more useful here. I made a web page describing their use with the
Much of it should also be applicable to the HDSPe AES32 (allowing
for different parameter names and channel numbers).