Timecodestamper plugin and ltc timecode from linein of sound card

Hi, I will try to explain my problem as clearly as possible, thank you for everyone who will find time to help me.

For a project at work we have to develop a program which receives RTSP stream and ltc time code from linein of sound card. LTC generates by harware or sowtware generator (jltcgen for example of sowtware ltc generator).

How i can understand form documentation for timecodestamper (timecodestamper) it possible read ltc from sound card ( source=ltc – Linear timecode from an audio device).

But i cannot understand how to point device (for example line input on sound card) for reading ltc sound signal and how to build such pipeline for gst-launch.
Can somebody show simple example of pipeline with ! timecodestamper source=ltc"?