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Submastering
What is a sub master?
Also called a dub master, this is a first generation copy of your edit master. It should be created immediately after your edit master is completed using a high level format such as BetacamSP, DigiBeta, DVC-PRO, D2, or DVCAM.
Why do you need a sub master?
In the event of a mechanical failure that causes damage to your tape, a sub master prevents you from having to go back in the studio and re-edit / re-create your program. It is similar to backing up a computer in case of a system crash. It is very inexpensive insurance.
Does the quality of my VHS copies diminish due to generation loss when using a submaster?
Absolutely not, when your program is properly submastered on a broadcast quality format.
Here are some suggested guidelines when creating a sub master:
- Use new tape stock (this is not the place to cut expenses)
- Include color bars and audio tone at the head of the tape. Establish a relationship between these reference signals and your program material. This will help to ensure that your copies look and sound as you intended.
- Include at least fifteen seconds of black (no audio) before the start of your program. Omit countdowns.
- Audio: Provide 2 channel mono or stereo. Please mix the channels. (4 channel audio, split audio on separate channels, requires a best effort mix by DCA Media Solutions. VHS can only play back 2 channels).
- Include at least one minute of black (no audio) after your program has ended.
- Avoid putting multiple programs on a single tape.
- Avoid putting your program on multiple tapes (switchovers). Some of the newer digital formats can hold 2 to 3 hours of program material.
- When labeling your tape include relevant information, such as Total Running Time, False Endings, Closed Caption, Audio channels used, Stereo, etc.
If you have any questions about sub masters or any other topics, please call (800-790-4947) or contact our expert staff (see Contact Us). We will respond to your needs immediately.
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