Immediate ``bang''

Since we have three main error types (note, rhythm and dynamic), we will have three outputs to indicate them. These outputs are defined as outlets for the jMax object: that means we can get those outputs in the jMax environment and do what we want with it: alarm sound, visual signal, counters, etc.

Outputs are made as soon as the error has been detected, i.e. before everykind of classification. If we get a bang for a note error, We only know that an error has been made, we don't know which kind of note error (wrong, skip, added) it was.