I sat down and listened for a while to the mp3 on repeat and I finally managed to come up with something... for the first song. I guess I'll have to do that again for the other one until I can find another bassline in my head.
On the unrelated topic of recording and mp3s, whenever I record something on audacity it sounds like its an octave lower for some reason?
It's been a long time since I used audacity so not sure why it would sound an octave lower. Maybe try Reaper to see if it happens there. Reaper is free to try and is much more powerful compared to Audacity in my experience.