LTC timecode not fully syncing wave files.

I’ve run several tests sending LTC timecode to my Zoom H5 audio recorder using Deity timecode generators (TC-1). I’ve tested a variety of setups: sending timecode to a single input while recording separate audio to another, and recording stereo files with LTC on the left channel and clean audio on the right.

Regardless of the setup, when I import the WAV audio file into Premiere Pro, convert the LTC timecode, and sync it with other cameras that also used LTC, the WAV file is always 30 to 50 frames out of sync. I’ve followed all the proper steps—right-click, Modify > Timecode > Audio LTC—but the result is consistently inaccurate across multiple files and devices, including my Zoom H6.

However, when I import the same files into Deity’s Timecode Toolkit to decode the LTC, then bring the decoded file into Premiere and sync by timecode, everything works perfectly. This clearly indicates that the issue lies within Premiere’s handling of LTC from WAV files.

This seems to be a bug in Premiere, as the problem exists in both the latest update and the one before it. While LTC syncing works fine with video/audio files recorded on cameras, it does not work properly with standalone WAV files carrying LTC.

It would be greatly appreciated if Adobe could update this feature to support WAV files more reliably. Premiere is close—it almost syncs correctly after decoding—but it’s still off by several frames, making it unreliable for professional workflows.