Can I retrieve Whatsapp voicenotes which have been deleted while recording? If I record a voicenote on Whatsapp and there is an interruption while doing so (incoming call, calendar notification), the recording is immediately aborted by Whatsapp.  A little dustbin pops up in the bottom right corner and I cannot stop the recording from being deleted.  Is that "piece" of recording available somewhere or was it never saved?
If the dustbin animation is shown the voice note probably is deleted. 

Or you can check all the saved voice notes on the SD card. 
The path is 
Whatsapp/Media/Whatsapp Voice