Click Track Bleed
Click track bleed is one of the most annoying things that can happen in a scoring session, especially when it only gets discovered later in the mix. It results from the click on the headphones of the musicians spilling over to the microphones. Usually, an experienced recording engineer will have a master volume for all the clicks which he/she can adjust according to the loudness of the cue that is just being recorded and additionally every musician has his/her own headphone with an individual volume knob. So if you have a good engineer he/she will be careful not to make the click too loud to be audible on the mics. In very soft cues where not all instruments of the orchestra are involved, it should be communicated to the musicians not involved to un-plug or turn off their headphones beforehand or at least put them over one leg. There are also some engineers who set up a clever click-track that automatically adjusts its volume according to the overall volume in the room. A slight click track bleed in the mix usually is nothing to worry about too much as the base-level of “noise” of a movie is usually high enough to cover-up these clicks. However, on the session especially on very soft part have a thorough listen whether there are any clicks audible on the microphone signals.