This was the very last part of production for me where I had fully rendered my animation and put it into Premiere pro. Once in premiere I started looking for different free sounds that I thought would work well with my animation such as the sound of wings moving, footsteps on concrete and animal noises for my man bat. Most of the sounds I used I found on site called https://freesound.org/.
Once I had the main sounds in I realised that once sound had stopped playing, for example footsteps, the change was too sudden. To fix this I added a dark drone along with another track to break the silence and make the audio flow better.