yoooo, it's the FM source selector

yeah, so this is what gets streamed to the FM transmitter, and doesn't consider the fallbacks on the transmitter side

                                 jukebox
                                      |                        reserve PGM feed
                                      |
                                      |                            |
                                      |                            |
                                      |                            |
                                      |                            |
                                      |                            |
                                      |                            |
                              +-------v------+                     v
                              |              |               +-----------+
 PGM feed                     |              |               |           |
from studio selector---------->              |   RTP link    |           |
                              |    dolby     +-------------->| fmstl     +---->TX
                              |              |               |           |
                              |              |               |           |
                              +----^---------+               +-----------+
                                   |                              ^
                                   |                              |
                                   |                              |
                                   |                              |
                                   |                              |
                                   |                              |
                                   |                              |
                              autonews
                                                            technical difficulties
                                                           audio

controlling

It supports three sources (tho, could be expanded without too much work)

ID	Source
0	PGM Feed
1	Jukebox
2	AutoNews

You can poll the currrent source with curl localhost:5001/source (this works from any host). You can set a source with curl -X POST -d source=N localhost:5001/source (this only works from localhost, where N is the source number)

The current source is stored in /opt/fm_sel/source.txt. It logs to /opt/fm_sel/sel.log.