Motorola Moto G — auto downloading music from subsonic music streaming

dear all

since last three months i am using moto g 4. previously i was using samsung mobile.
i use to hear music which is streamed through sangeethapriya.org (subsonic).
as i hear the music, the same was downloaded to a folder so that the music can
be heard offline.

but in moto g4, i can hear the music from subsonic, but the music is not downloaded.
i wonder whether is it necessary to change any setup. kindly let me know how to
download the music from subsonic while hearing it.

thanks

m s narayanan