Since it is impossible to capture all the details of a piece of music and put them on a piece of paper, we have to make some form of interpretive judgment. This is where performance practice applies, but also where taste and personal judgment enter the scene. In the realm of classical music, we have scholars who research the instruments and writings of the era in order to offer opinions and guidance about how a performer of that time period would have interpreted the page of a musical score. We can choose to follow their guidance, or choose our own path. Leopold Stokowski adapted Bach for orchestra. Did he follow proper performance practice? No, but did he make music? Yes. One of the organists causing a bit of controversy with his use and view of the organ is
Cameron Carpenter. He just unveiled a new touring instrument at Alice Tully Hall earlier this month. While I haven't yet seen a video of him playing the new instrument, you can watch him play the Bach Toccata and Fugue: