Recuva not finding missing audio on SD card

I just downloaded the latest Recuva to help recover some audio. Here is what happened.

I was recording some audio onto an SD card and my batteries died, during the recording.

The meta data shows something is on the card, just no audio is found. **See attached screen shot

I have tried both the quick and deep scan on Recuva and it found nothing.

I have explored all of the options in Recuva, and it finds nothing corrupt.

Any suggestions on how to use Recuva to recover the audio?

Many thanks. Kevin

Lost audio file screen shot from March 23 2024.jpg