Video is 23.98 fps on Red and Audio was recorded at 24 fps 48K

[Job Ter burg]

https://www.sounddevices.com/tech-notes/file-format-overview
Because most SD and HD video formats use a 48 kHz sampling rate for their native audio formats, sound files are generally recorded at 48 kHz. Nonetheless, there are numerous exceptions to the 48 kHz rule.

In NTSC-land, one exception is the sampling rate of 48048 Hz (48.048 kHz), 0.1% greater than 48 kHz. It is used in select applications when film or video is shot at true 30 or 24 frames and is pulled down to 29.97 or 23.98 in post. When those 48.048 sound files are played back at 48 kHz, the 0.1% pull down will be achieved without additional sample rate conversion.

[Bouke Vahl]

[Job ter Burg] “When those 48.048 sound files are played back at 48 kHz, the 0.1% pull down”

If this is the case, I stand corrected of course.
Do you happen to have one of those files to study? (Just for hobby, I very much doubt this is still used nowadays.)
Both samplerate and byterate should reflect 48048.
Of course there is no way for me to check what is really happening unless there is tone that should be at a very exact frequency, but still, it’s fun. (Yes, I am a nerd.)

Bouke
http://www.videotoolshed.com

[Michael Phillips]

You can also open a copy of the files in Wave Agent and set sample rate to 47.952 and it will get pulled down upon import. See my spreadsheet for these types of modifications:

https://24p.com/wordpress/?p=195

Michael