I'm with Jeremyr
I'm sure it can be done... I have often heard Organ players and Keyboardist step into the bass realm, when they are not used to playing with a Bass Player.
When we play something that was not rehearsed, whether it be spirit led or just impromptu. My brother will play the bass lines on the keys until I can catch up. Then
there is usually a period where we both are playing, until I nod I got it then lets me have it. I personally like it when we both are playing, it gives the low-end a certain fullness.
Not to mention he is a phenominal musician, that pushes me to get better.
Anyhow, if there is a focus on God, I don't think the move of the Spirit would be a problem, unless there is unspiritual people 'performing' and not 'worshipping', and then one has
to think, was that truly a moving of God. Anyhow, not wanting to stir things up, or open that, can....