Is there a symbol or method for omission in music? Couldn't find anything in the codebook.
The context: I have a piece in an instrumental book that has circles indicating notes left out that the student has to fill in. My only thought was to use something like a word-sign and the letter "o" because it wouldn't be confused with anything else...
There really isn't anything standard at this point. I have used transcriber-added rests matching the beat value of what's missing. That helps with the counting of the measure - knowing how many beats are missing and being able to properly evaluate what is already there.
The word sign O could work too, if there is no ambiguity with the counting of the measure. You could try out both ways and see which one feels better. (Be sure to give the student a heads up in a TN whichever way you chose.)