Ghpsdr dspserver
From HPSDRwiki
The dspserver program is used to separate the DSP components from the GUI components.
dspserver accepts the following command on the command line.
--receiver 0|1|2|3 (default 0)
receiver that this client is attached to (Please note singular). Also please not that receivers are 0 based.
--server 0.0.0.0 (default 127.0.0.1)
ip address of the server machine. Default is the localhost (127.0.0.1).
--soundcard name (depends on your machine)
--offset 0