Sound Cloud can be used to upload files to Wavve. In order to do this, you will need to find the RSS feed for your Sound Cloud account.
The following two links from Sound Cloud will help you find your RSS feed in Sound Cloud as well as how to add audio files to your RSS feed in Sound Cloud.:
https://help.soundcloud.com/hc/en-us/articles/115003570048-Setting-up-your-podcast-s-RSS-feed