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Performing a Layback to Tape Besides controlling a deck during editing in Pro Tools, another useful function in 009 allows you to layback your mix to tape, inserting a Video deck's audio channels into record whilst Pro Tools chases. In Order to do this, you will need to 'arm' the deck - specifying which tracks should be recorded on, and also specifying the in and out points over which you want to record. Finally you will perform an 'Auto Edit' command where the Video deck 'rolls' the edit and automatically punches the appropriate channels into and out of record. |
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| First thing to do is to mark the in and out points for the edit. Use Pro Tools to locate the deck, then press 'Mark In / Out' in 009, or manually enter the timecodes for start and end of the layback. | |||||||||||||
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| Next, you need to Arm the tracks to record onto. Press the 'Arm' Button and check the tracks you need. Typically you will want to arm one or both of the audio channels, along with checking the 'Insert' check box. This will enable a simple 1 or 2 channel audio insert edit on the tape, leaving the timecode and video tracks untouched. Be very careful not to arm tracks which you wish to keep !!!! For traditional Video deck only the left set of check boxes are used and you should uncheck 'Send Byte 2'
Some VTRs, such as Digi-beta machines have an extended track arming setup. These machines use 2 bytes instead of 1, and you will need to check the Digital audio tracks in byte 2 in order to layback to those tracks. There are also settings inside the VTR itself which control how the machine responds to 1 and 2 byte track arming commands. Always refer to the technical manual for your Video deck to determine which tracks must be armed. Note that the check boxes simply relate to bits in a single data byte sent to the deck for arming. The names shown below are how these bits are setup for a typical VTR. However, your machine may well have a different interpretation of these bits, and you may need to setup a new track arming template to relate the bits to the channels on your machine. A good example of this would be for a multi channel audio deck controlled via 9-pin. Note: if you check the 'Assemble' box, most VTRs will record across ALL channels, even if you have not checked them separately |
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| If you wish to create your own machine arming template, simply create a text file with 16 lines. On each line, enter the name of the bit which corresponds to that line. The generic device template can be used as a guide. Ensure this is a raw 'TEXT' file, created with a tool like BBEdit, not an RTF text file from Text Edit. Entering 'unused' in a line will disable it in the track arming window.
Once you have armed your tracks, the 'Perform' button will become enabled. Pressing this button will issue an 'Auto Edit' instruction to the VTR, which should back up to a pre-roll point before the selected In Time - then roll, punching in and out at the appropriate points and stopping after the post roll. The idea is that Pro Tools is chasing during that time, such that the Mix from Pro Tools is laid back to tape during the Auto Edit. Alternatively you can simply play the VTR, then press the 'Rec' button to issue an Edit On immediate command to punch the VTR into record mode. Press Play again to punch out of record. |
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