Grass Valley Maestro Master Control v.1.7 - Manual (Page 199)

Maestro Channel Branding User Guide 195
7th Step: Effects Configuration
Figure 152. Audio Cross Fade - Video Cut Transition
In this transition, audio begins to cross fade immediately from the old to the
new source upon execution of the transition. The cross fade takes 45 frames
to complete (1 1/2 seconds in the 60 [59.94] Hz standards) after which video
cuts from the old source to the new source.