If you get this error when you try playing despotify in OpenBSD:

despotify_get_pcm() returned error -1320 (with despotify-simple)
despotify_get_pcm() failed (despotify ncurses log)

You need patch and recompile despotify-obsd. Spotify has now started using mp3 as their audio codec. Despotify upstream developers have added support for decoding mp3 encoded streams using libmpg123. So you need adding mp3 support in your despotify-openbsd code and in your OpenBSD library system.  This patch enables it and automatically select between ogg vorbis and mp3 based upon the stream data. You can manually apply it until upstream developers add it to git branch. 

The mp3 fix has been pushed: https://github.com/eest/despotify-obsd