[DaveBlake]

I have discussed this issue with @fritsch our paplayer expert. There is a fundamental problem with playing .shn files in paplayer with current approach of enqueing buffers time based (seek). These format of files are not currently seekable by ffmpeg, while videoplayer will play them seek doesn't work either. 

By all means rise an issue on git, but an immediate fix is unlikley.

[jjd-uk]

I'm curious as to these files are sourced from? It's not a format I've ever heard of but from what I've read it's a format that had limited use for concert music.