SoundCloud is an online audio distribution platform which allows collaboration, promotion and distribution of audio recordings
SoundCloud was originally started in Stockholm, Sweden, but was established in Berlin, Germany in August, 2007 by sound designer Alex Ljung and artist Eric Wahlforss. It had the intention of allowing musicians to share recordings with each other, but later transformed into a full publishing tool which also allowed musicians to distribute their music tracks.
A few months after it began operating, SoundCloud began to challenge the dominance of MySpace as a platform for musicians to distribute their music, by allowing recording artists to react more nimbly with their fans
source : Wikipedia