My GA8ES (96/97) also has a remote with the "input macros", however the Pronto managed to learn *something* from them. I don't have a Sony TV to test the entire macro functionality of it, however when I use the learned signal it does indeed switch the receiver to the proper input.

This normally is a real problem for Sony owners who purchase universal remotes with no built-in codes. Interestingly, the Sony RM-AV2000 includes input-switching signals that aren't macros - they only change the receiver's input (yet still turn it on when it's off). These can be learned any remote that'll take other Sony signals (not all do).

It also includes a POWER TOGGLE code, unlike the standard remote which only has dedicated OFF and ON TO INPUT buttons. Both remotes were very handy in programming the Pronto.