Is this something that you find compelling? Does sharing sound intrinsically valuable to you? Do we need a social network just for sounds? I don't get it.
"Sounds" are one of those things that have to be consumed synchronously and as a whole (generally speaking). Long and short form text, and pictures, can be compressed, sliced up, moved around, and we may get the gist of it - and can easily share.
Videos... not as much, but we can still take a small segment of a video/movie and get value from it.
Songs, probably similar to movies, but sounds as a broader topic, not so much. At least, not to me.