I’m not sure what you mean by ‘switch between tracks’. As far as I know, there is no documented method for selecting a track on the Analog Four using MIDI messages.
You can change pattern on the Analog Four by either:
[ul]
[li]sending a MIDI Program Change message to the AF on its PROGRAM CHANGE IN CHANNEL (see page 48 of the manual), or[/li]
[li]sending a MIDI note message to the AF on its PERF CHANNEL if you have set up the Multi Map feature to use the PAT.PLAY function (see pages 48 to 51 of the manual).[/li]
[/ul]
As far as I know, the FCB1010 can be programmed to send both Program Change and Note messages, so you can choose whcih method is best for you.