The new v 3.10 Sound Devices firmware update for the 633, 664, and 688 adds support for third party wireless control, time code and metadata management including the Timecode Systems :wave, PureBlend's MovieSlate iOS app, and Ambient's Master Lockit. With just the firmware update (downloadable here), a time code hub, and a link cable, you can now control your mixer from your iOS device (Timecode Systems) or any web browser (Ambient Lockit). The Ambient Lockit will also work with your 788T.
Here are the gear lists Sound Devices put together:
iOS Wireless Remote Control Integration (more info from MovieSlate)
Web-based Remote Control Integration (more info from Ambient)
More details and set-up diagrams here!
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