LiquidSoap deson't recognise Stereotool as an operator, sees it as a variable.

[simon-anderson]

Hello!

I'm using version LiquidSoap version 2.3.1. I think the issue is that I haven't installed the necessary plugin to enable LiquidSoap to use Stereo Tool as an operator but this is just a guess and I don't know which plugin I might need. Hopefully someone out there can tell me what I'm missing or doing wrong.

When called by LiquidSoap this script:

#!/home/simon/.opam/default/bin/liquidsoap

# Define the capture variable
def jackConnect()
  system("jack_connect Mixxx:out_0 liquidsoapstereo:in_0")
  system("jack_connect Mixxx:out_1 liquidsoapstereo:in_1")
end

# Enable logging
set("log.file",true)
set("log.file.path","/home/simon/liquidsoap.log")
set("log.stdout",true)

# Define the source
mix = input.jack(id="lidquidsoapstereo")

# Process source through Stereo Tool
mix = stereotool(
        library_file="/home/simon/Downloads/libstereotool/libStereoTool_intel64.so",
        license_key="/home/simon/stereotool.lic",
        preset="/home/simon/Downloads/SW.sts",
        mix
)

# Output to Jack
output.jack(mix, id="soapstereo", on_start=jackConnect)

...produces the error:

Error 4: Undefined variable stereotool

Any and all advice appreciated.

[gAlleb]

Hi! How did you install liquidsoap? I assume opam from your code. If you have installed it via opam - you need to install ctypes-foreign package -> opam install ctypes-foreign

You can see different dependencies needed for LS via liquidsoap --build-config.

P.S. Also if you install Liiquidsoap via package - be sure to install not minimal version.

[simon-anderson]

Thank you very much gAlleb, installing ctypes-foreign via opam solved this issue and stereotool() is now properly recognised as an operator instead of an undefined variable.

I do have another problem with this script, and that is that the jack_connect statements don't connect the Mixxx:y inputs, I have to connect them manually in QjactCtl even though the interfaces exist when I launch the script. Any ideas what I'm doing wrong there?

[gAlleb]

I do have another problem with this script, and that is that the jack_connect statements don't connect the Mixxx:y inputs, I have to connect them manually in QjactCtl even though the interfaces exist when I launch the script. Any ideas what I'm doing wrong there?

Hard to say. If jack_connect connects ports outside LS script - then system or process.run should do the same. It's just a way to run terminal commands from LS in some sense. Alternatively maybe you can can call QjactCtl itself with -s and --session flags or a bash script of some sort to prepare the enviroment.