Audio Speaker
Current spacedesk Android and Windows 7 Viewer apps already supports remote Audio.
To enable in spacedesk Android Viewer app, make sure to enable first the on-screen menu.
Upon spacedesk connect, Audio can be enabled/disabled via On-Screen menu.
To enable in spacedesk Windows 7 Viewer app, click the Functionality -> Audio Speaker (experimental) before spacedesk connection.