You could set your work area, or just interrupt the preview by tapping the space bar when the green line (cached) gets to a point in time that you feel is sufficient. You could also preview audio only by tapping the numeric keypad "." key.
"Press Alt (Windows) or Option (Mac OS) while initiating a RAM preview to preview the specified number of frames up to and including the current frame. The default number of frames previewed with this command is 5. The preference for changing this number is in the Alternate RAM Preview section of the Preview preferences. (See Previews preferences.)"
1 person found this helpful
Here's a pretty handy thing to know: when you scrub your audio to find just the right point on your timeline, make sure the Caps Lock key is ON. This prevents the video in the comp from updating, and it's a snap to find the right place in the audio.
Then put a marker on the timeline: Shift-0 thru Shift-9 on the ALPHANUMERIC part of the keyboard, not the numeric keypad. You can then jump to the marker, just by hitting the 0 thru 9 keys, using the ALPHANUMERIC part of the keyboard, not the numeric keypad.
No RAM Preview necessary!
Want to re-use those timeline markers? Just drag 'em off way to the right in their little "timeline marker house"... I forget its proper name. It's so difficult to remember such trivial little things without a proper graphic map of the AE interface. Adobe USED to print them, y'know...