Sony DNW-A75 BETACAM SX Operation Manual page 57

Starting playback immediately after preroll
Press the PREVIEW button.
The PREVIEW button lights, and after preroll, DMC
playback is carried out for the section from the speed
variation start point, then playback continues at normal
speed from the speed variation end point.
Stopping the tape during DMC playback
Press the STOP button.
To exit DMC playback mode
Press the DMC EDIT/FEED button and the DELETE
button simultaneously.
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Chapter 4 Recording and Playback