Dolby Laboratories 585 - Manual (Page 30)

Model 585 Time Scaling Processor Pitch Shifting
4-2
2. Use the knob or arrow buttons to scroll through the second line display until
you get to Pitch , then press Enter .
3. Use the knob or arrow buttons to adjust the value on the second line.
A flashing block displays as you change the value. The new value activates
only when you press
Enter . To leave the active value in effect and return the
display to that value, press Esc .
Using the Main Status Menu
In the main status menu, you can adjust the pitch shift value by turning the knob.
Pressing either arrow button scrolls to other status menu displays.
Caution: Adjusting the pitch shift value in the main status menu activates that
value change immediately, without pressing
Enter . You do not have the
option to press Esc to return to the original setting, so note what that
setting is before rotating the knob.
4.2 Using Pitch Shifting to Perform Online
Time Scaling
You can use the pitch shifting function of Model 585 in combination with other
equipment to deliver online time scaling of programs of any length.
To perform online time scaling:
1. Adjust the playback of the source program to match the timing requirements
for final program delivery.
2. Use Model 585 to adjust the pitch shifting percentage.
The amount of shift required is roughly opposite in value to the playback
speed adjustment. For example, a program with a playback speed adjustment
of +3.2% gets a pitch shift adjustment of –3.1%. Use the equation at the
beginning of this chapter to calculate an exact value.
3. To maintain A/V sync, either add offsets in the timecode between the audio
and video playback equipment, or add a delay to the video equal to the
Processing Delay setting on Model 585.
Processing Delay is an option under Operating Mode.