Rehearse at home!
If you wish to note-bash at home, this small program can be very helpful. It is called ‘Noteworthy’ and can be downloaded to your computer (Windows only, I’m afraid). Once installed on your computer, you can load in the music files for various popular choral works and listen selectively to your part as the orchestra plays the accompaniment. You can speed up or slow down the playing speed to help you learn the tricky bits.
Online Scores
Bach St John Passion
Noteworthy zipped file for St John Passion