Stations and Playlists
Using Jamroom
Playlists are designed to be curated - i.e. "hand picked" songs and videos - It's not automatic. If you need to have songs automatically appear in a playlist, then you need to use a custom Form Field (for users to select if they want the song in the playlist) and a {jrCore_media_player} call.
{jrCore_media_player} accepts the same arguments as {jrCore_list}, so you can build very specific playlists of whatever you want.
https://www.jamroom.net/the-jamroom-network/documentation/jamroom-developers-guide/788/jrcore-media-player
This lets you create a dynamic playlist of songs based on your own criteria.
You would create a custom form designer field in the audio create/update forms that allows your users to decide if they want the song in the playlist:
https://www.jamroom.net/the-jamroom-network/documentation/jamroom-admin-handbook/1275/using-the-form-designer
and then use that in the "search" condition - i.e.
{jrCore_media_player type="jrAudio_player_dark" module="jrAudio" field="audio_file" search="audio_include_in_playlist = on" order_by="_item_id desc"}
That assumed you created a custom checkbox form field called "audio_include_in_playlist".
Play with it a bit and I think you'll see what you can do.