Bruce Campbell, Assoc. The present limitations of text on the Web prevent me from using my custom font which allows musical notation within text blocks. I hope that the substitutions below are understandable. I'd appreciate an E-mail message when you find them. You'll see accidentals routinely in tonal music.
Accidentals have many sources and causes.
This page will deal with common occurrences that play a harmonic role. Occasionally a measure will have a note with an accidental in front of it. Of course, that same note in the following measure will be played according to the prevailing key signature. Commonly it will be in parentheses. This practice clutters scores considerably and is not recommended for tonal music.