Boston Baroque’s recordings with Telarc will never earn back the money it takes to make them. But there are other advantages: “The records have invigorated our audience, and the reception the records have earned — including three Grammy nominations — has changed us from a local into a national and international ensemble. The recordings have led to invitations to tour in Europe and in America. We have five weekends a year to say `Come and hear us,’ but the recordings can introduce us to people all the time. And the recordings have had a tremendous impact on the musicians. The intensity of the recording process is a lot different than rehearsing a concert and presenting it. And of course through recordings, the group can hear itself.”