kvaudio

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