Changing OTS with a MIDI Foot Controller

[chikitin]

Hi,

Is that possible to change OTS while playing using a MIDI controller? I am not talking about Foot pedal. I know one can set Pedal 1 to OTS - and Pedal 2 to OTS2. Let's assume the pedal is connected to PSR via MIDI cable, as in MFC10? I have also UD-WL01 and iPad, but I don't think that would be useful.

Does anyone know what is the MIDI format of OTS+/- or OTS1,2,3,4 messages?

Any help would be appreciated.