Hi Mr M,
No unfortunately, and its been driving me nuts, so much so that I contacted the developers to vent my frustration (and to ask them why they didn’t have basic useful features like return to start of track/loop etc). They said there is no way to turn it off - shame as its really annoying! 
The also said there is a shortcut for looping however…
Has anyone ever managed to get the supposed ‘repeat sound’ to work (shortcut: what looks like either an up arrow or shift and L) regardless this totally never works for me in Chrome- anyone else have more luck?
Regards,
Kat 
PS: Having an audio interface with only a play/pause button seems nuts to me, I wish they’d introduce little transport icons (like every other audio interface in the world) some weird design decisions on sound cloud (but I love it regardless)!