CRITICISM / We are used to hearing the dozen permanent musicians of Les Violons du Roy accompanied by supernumeraries when the repertoire requires it. Saturday evening, it was with I Musici, their Montreal counterpart, that they performed at Le Diamant, a concert previously given in the metropolis on Thursday evening. At the helm: Jean-François Rivest, first guest conductor of I Musici, who once once more proved to us that he is an authentic musician.