Non-Standard Audio Pulls

It is also possible to use pulled sample rates that do not fit one of the above scenarios. These sample rates would only need to be used in exceptional circumstances when an error has occurred elsewhere in the process of making a film.

The following settings can be used to correct sync errors made at another studio or problems with video editing systems:

• -4 % pull-down

  If a film project was transferred to PAL/SECAM video and the audio editing and mixing was performed at video speed (48 kHz) without using audio pull-up, the final mix would be running at video speed, not film speed. In this case, a -4 % pull-down can be used to correct this and get the audio running at film speed again. The downside to this is that the final transfer to film would either have to be analog or through a sample rate converter in order to be recorded with the film.

• +0.1 % pull-up

  This pull-up is not normally used except in situations similar to the one described above, but for NTSC video. It can be used to correct the speed of a project finished at video speed (without pull-down) prior to transferring it to film. Because film is moving 0.1 % faster than NTSC video, the audio mix can be sped up to film speed using +0.1 % pull-up for the transfer.

• Other pull-up/pull-down options

  There may be other scenarios where non-standard pull-ups and pull-downs can be used to correct mistakes. Nuendo provides further pull-up/pull-down options for such situations in the Project Setup dialog and the respective section in the Project Synchronization Setup dialog.