Caavo has been updated to work with Channel Master Stream+ and other OTA DVRs & components (such as Tivo Bolt, etc.). I experimented around with this and found you can now search for OTA content, switch channels, access channel guide, etc. on the Channel Master DVR … by Voice.
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Just for the heck of it, I then tested it with my cheapie Mediasonic Homeworx (thanks again @MarkKindle for helping me discover this little oddity), and it works as well, something I did not expect. I originally bought the Caavo as a Universal Remote solution, it’s turned out to be much more than that and if I used it for nothing more than a voice-activated HDMI switcher, it would be worth every penny. This little upgrade is icing on the cake.