Actually it is the Roku1 model that has the analog output. The Roku1's are also slower compared to the others and don't support some of the features the other Roku do (Mirror display, Netflix profiles, dual-band & hardwire port, etc...).

I had forgot all about the Roku1, since I always sell the Roku3 with all the features. But the Roku1 is cheap enough ($50) you could buy one just for the music streaming and for that, it should work fine.

[edit]: And before you post, Roku can be very confusing in their models and #'s they use. The NEW 2015 Roku2 does not have the analog connections anymore. The Roku2 from last year did (along with the slower processor from the Roku1).