I got in an argument with another member of my church choir because he recently started bringing his guitar to play at Mass and was 'practicing' the chords for the communion song DURING the visiting Bishop's preparation of the Eucharist. He was playing them quietly-- as if to not be heard by the congregation, but he-- of course-- was heard by the congregants. When I challenged him about his disrespect to the Bishop and to the Eucharist, he told me that 'lots of churches play music during the preparation of the Eucharist'... (also that 'lots of churces' have an acoustic guitar accompanying a perfectly good piano or organ).
I am convinced that he was bored (he had told me earlier in the Mass that he thought the Bishop's homily was 'boring') and wanted to practice as he is a beginner guitar-player, and tried to cover up his disrespectful actions by saying he intended to accompany the preparation.
My questions are these:
-Has anyone ever heard of playing music DURING the preparation of the Eucharist (aside from the Eucharistic hymns, of course)?
-Is it common for traditional Catholic masses to have a guitar playing along with the piano/organ?