I'd like to suggest a new feed in the spirit of your Instagram feed.
A feed for SoundCloud where you could select a SoundCloud artists profile URL and that would define the feed (I don't know how possible it might be to also do this by specifying hashtags or playlists, but to me the artist seems the most obvious source and target).
The presentation could be as per the Instagram feed - a slider or mosaic of sqaure tiles, derived from the 'cover artwork' for the individual tracks - and again perhaps take the lead from your Instagram feed on the layout and styling options (columns, rows, navigation, colour styles etc).
In default / non-selected view the display would purely be the cover artworks - but on rollover or click then perhaps you then have an overlay on the track (semi-opaque definable colour) which features a simple set of "Play" controls, the main track info (track name, artist) and also social icons to share the SoundCloud URL for the track to key social channels, as well as a link to go to the track on SoundCloud.
If playing the track via your feed widget could also ensure that the 'play' is counted as a play on SoundCloud itself that would be even better.
I hope this sounds a practical and attractive idea - I would certainly buy it.
Keep up the good work - love your Instagram and Twitter feeds!