Hide instrument from the Piano Keyboard

Dear all

I'm learning to play a melody and I just decided to write my own metronome inside the score. I have a 4/4 score and I want a metronome with 1/8 notes (this would make 8 hits in total). The buillt-in metronome does this only with 1/4 notes (this makes 4 hits in total). What I did was adding "Wood blocks" as an instrument and write the percussion notes for each measure (see my screenshot at the end).

Now, I played it in MuseScore with the "Piano Keyboard" on the screen. My idea is to do some video in order to visualize how the percussion hits are played in relation to the main score instrument. Then I can play it myself with the right tempo. The only problem here is that the "Piano keyboard" is playing both: the main instrument and the "Wood blocks" (see my screenshot at the end). Is there any way of hiding the percussion from the "Piano keyboard"?

Best regards
Josef