Call for Test files

[cmgoodin]

I am trying to determine the causes of many reports of "Sync Issues" associated with Time Code from various Production Recording Machines.  In order to establish a baseline for calculations used by the various manufacturers I need to assemble a collection of Broadcast Wav Files from the different machines that all have a common known Time Code.

I have already collected files from Sound Devices 700 series and Fostex DV824

I need test files from DEVA IV and V

Tascam HD-P2 And Aaton Cantar.

Also the Fostex PD6 and DV40

Also Test files from Pro-Tools 7.xx and Nuendo would also be appreciated.

The files need to adhere to the following specs.

1 or 2 Channels Poly broadcast Wav files. 5 to 10 Seconds in length.  16 or 24 bit 48000 hz Sample rate.

They can be blank (no audio) or if possible record the LTC time code from the TC out of the machine.

This can be used to check latency issues with encoding.

Use the following procedure to create each file.

Recorder should be set to Record Run Mode with PRE-Roll set to 0 sec. or OFF

1. Set the TIme Code Frame Rate to the desired  rate for that file

2. Set the Jam Time Code Time to 20:00:00:00  (twenty hours even and STOPPED)

3.  Jam the TC clock to the 20:00:00:00 number.

4. Record 5 to 10 seconds so all files start at exactly 20:00:00:00

5. Change to next Frame Rate and repeat steps 2 through 4.

I need files at the following Frame Rates.

23.976 FPS

25 FPS Non Drop

24 FPS Non Drop

30.00 FPS Non Drop

30.00 FPS Drop Frame

29.97 FPS Non Drop

29.97 FPS Drop Frame

I hope to find out if there are differences in each machine and the algorithm used to stamp the time code in the BWF header for  each frame rate.   

I am finding so far that there are errors in the Time stamps that could be responsible for discrepancies between machines on what the actual time code for any file is. 

Without establishing these baseline files it is impossible to determine the accuracy of Time code used in double system setups. 

You can email any files you create to me at

cmgoodin@pacbell.net

Thanks to anyone who can help out.

----Courtney Goodin