Changing the Voice on a Midi file using Mixmaster

[SandeepSaxena]

Hello,
Using Mixmaster I'm playing a midi that was created in Cubase. The voice is the default piano voice.
I'm sending Mixmaster output to my psr s970. So now the output picks up the voice that the PSR is set to.
Is it possible to apply the PSR selected voice to this midi file and re-save the midi?
Thanks