workflow_indawpass.pdf
last modified : 2007 April 17th -- 18:22
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A sound investment for post-houses

How should post houses cope with the coming of age of multitrack digital audio recorders ?

IndawPass made a name for itself by speeding-up the image and sound syncing that video dailies require; anticipating on the coming availability of CantarX, Deva3, PD6, Portadrive on-location multitrack recorders, the new IndawPass (Windows-2000) converts all recording forms - analog tapes, digital tapes and multi track files - into the two tracks that image editors require.

This 'mixdown' is a real-time process happening while dubbing two AES tracks onto a video cassette, and can be performed at a tenth of real-time for CD-burning or hard-disk copy to Keylink-Instasync and image editing stations.

Note: using an external firewire go-between hard drive belonging to the client (such as the LaCie Databank or Pocket Drive), you can day after day incrementally load the client's audio material for him to bring it 'complete' to the mixing room. Here, using the file names as a criteria (instead of the audio tape IDs), the conformation of the multi track original files to the CMX EDL out of the image editing station becomes a fully automatic process, a sound editor dream.

Jack of all trades

With its 'Prelocator' and 'Slate Finder' IndawPass is faster at syncing dailies than any other system around - and even more when it comes to multi camera shooting. After the telecine session IndawPass cleans the start-of-take Keycodes and adds the post-synced AudioTCs to generate clean and complete FLeX/ALE transfer lists which speed-up NLE digitization. It also burns Characters and Vitc on off-line copies of master video tapes. IndawPass handles 16 & 24 bit polyphonic & monophonic BWF files, FAT32 & FAT16, imports up to 8 track from DVD-Ram and FireWire connected on-location hard drives, is Ethernet networkable, and burns CD-Rs.

A smart tape-to-disk recorder

IndawPass tidies up the many LTC and audio sampling rate mismatches film/video post engineers encounter. It eliminates the drift between the DAT sampling clock and the time-of-day recorded on the LTC track. For documentary sound mixers it adds up silent leaders at the head of the files to let the Avid MC 'group clip' get the first images of a camera starting nine sec. before the audio recorder.

'PreLog', the most accurate slate detector

While monitoring the tape-to-disk transfer, the operator on-the-fly puts 'Prelocators' on slate announces ; he also keys the scene/take IDs and enters wild-sound tags. 'SlateFinder' then detects clapsticks with better than human precision and stores operator entries showing on printed reports and in the Avid v.11.n, XPress-DV v3.5, FCP4 audio bins.

'PostSync', the fastest audio synchroniser

As opposed to several seconds with other systems, IndawPass syncs the sound in less than 40ms at the head of each video take. This allows for uninterrupted post-syncing of a video tape while recording its mirror DAT. Whatever the sound and video standards, IndawPass eliminates jitter and glitches: a sound recorded in a PAL environment can be dubbed on a drop-frame NTSC video tape!
PostSync sorts wild tracks and records them at the tail of video tape dailies; their on-location AudioTC is correlated to the tape VideoTC, and inserted into the ALE transfer list.

List regeneration and editing auto-sync

IndawPass creates or corrects Keylink FLeX or ALE transfer lists, fine tunes the in-points, adds the slate AudioTC to the Keycode and the VTR VideoTC. Exported to editing systems, these lists allow for instant group-clips between images and sounds imported through CD-R.
IndawPass's bwf files are directly read by Lightworks' Touch, Avid v11.n and Avid Xpress-DV v3.5, by FCP-4 (with sebsky tools), and by Avid v7 through the AtonXfer BWF to OMF converter.

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