I thought it would be nice to Install a Soundcloud/MixCloud embedding plugin:
You'll find the button on the far right of the WYSIWYG editor (where the smiley insert button is located)
You can now share available Sound and Mix Cloud tracks in your posts. Click the button and insert the track's corresponding embed codes, Wordpress codes, or track URLs, all of which can be obtained from the Share option associated with tracks on soundcloud.com and mixcloud.com.
Your embedded track should look like the example below, enjoy!