LinuxSampler LSCP port

BEB · January 12, 2020, 11:21am

Hi guys,

I am trying to connect to the Zynthian Linux Sampler using LSCP (Linux Sampler Control Protocol), but the TCP session is rejected by the Zynthian (“socket error : connection refused”)
Is the port number still 8888 for LS on the Zynthian ? Or was it changed ?

Thanks

Benoit

wyleu · January 12, 2020, 11:24am

8888 is used by the MOD-UI interface if it’s running.

BEB · January 12, 2020, 1:54pm

Yes, I know that. I am not using MOD-UI, but I am afraid MOD-UI keeps it (it has to be listening all the time on this port to know when a browser connects)

I will turn my question differently (and simpler) : what is the port LinuxSampler uses for LSCP on the Zynthian ?

Benoit

Baggypants · January 12, 2020, 10:39pm

Time to to learn a new tool on linux!

root@zynthian:~# ss -plunt | grep sample
tcp     LISTEN   0        1                0.0.0.0:6688           0.0.0.0:*      users:(("linuxsampler",pid=680,fd=3))

ss shows traffic -plunt filters with pid,listening ports, udp traffic, numerical view, tcp traffic

looks like port 6688 might be the one you need, but check with ss -plunt

BEB · January 13, 2020, 9:06am

Excellent, thanks !!!

I will try it asap to check the port number (by the way, I realized because of this problem that LinuxSampler documentation is sometimes a pain to read…)

The only place I could find an almost official value for the port number is the help option of LS, in which it is written “-p xxxxx : defines TCP port number for LSCP, 8888 by default”

If the LS in Zynthian is using 6688, it’s probably defined at startup on the command line. I willm check that also, to make a double check

Benoit

jofemodo · January 13, 2020, 9:31am

github.com

zynthian/zynthian-ui/blob/e4907becbac23140f5c8644f6f8994b89b66169e/zyngine/zynthian_engine_linuxsampler.py#L77


      
          	# Controller Screens
          	_ctrl_screens=[
          		['main',['volume','pan','portamento on/off','sustain']]
          		#['portamento',['volume','poly on/off','sostenuto','portamento time']]
          	]
          
          	# ---------------------------------------------------------------------------
          	# Config variables
          	# ---------------------------------------------------------------------------
          
          	lscp_port = 6688
          	lscp_v1_6_supported=False
          
          	bank_dirs = [
          		('ExSFZ', zynthian_engine.ex_data_dir + "/soundfonts/sfz"),
          		('ExGIG', zynthian_engine.ex_data_dir + "/soundfonts/gig"),
          		('MySFZ', zynthian_engine.my_data_dir + "/soundfonts/sfz"),
          		('MyGIG', zynthian_engine.my_data_dir + "/soundfonts/gig"),
          		('SFZ', zynthian_engine.data_dir + "/soundfonts/sfz"),
          		('GIG', zynthian_engine.data_dir + "/soundfonts/gig")
          	]

Regards,

BEB · January 13, 2020, 8:13pm

Hi José,
I confirm : the LinuxSampler in Zynthian reacts to port 6688. I have made a quick test by sending LSCP commands to this port (rather than 8888) and the LS reacts as expected.

Thanks

Benoit