Just take it, works fine and is easy to be installed, even in J1.7.3
It only lacks, if you want to use it inside a custom module with the attribute "prepare content" active. There it will show up even correctly , read the xml correctly and show titles and that it is playing correctly, but you will not hear the music.
Some hint for you, infograf: If i open additionally a content (with this player) and start/stop playing a song there, then the custom module player will work from that moment on until i leave the content page.
Of course, I would appreciate it, if this works too ;-)
Better talk about this in the Support forum (link above).
Anyhow I do confirm the issue when the custom module is assigned to a sub-menu when using some specific 3pd extension menu module .
Here I got the issue with ARI Ext Menu. It looks like the js used is the culprit.
Please test on a parent menu item.