Anyone give me a insight into making these mid noises?

Are you referring to the square bass? You only need one square oscillator (preferably osc2 since you can control its phase if you want a hard attack at some stage). Put it through a LP filter (just 1 is enough here too) with some resonance (not a lot) while cutoff is low and controlled by the filter env. (again not a lot, as it should only take you to the mid range). Start with the default filter env of the -init- patch, you can get all the other sounds by changing attack and decay times. Once you get the hang of these env. parameters you can automate them, or control them with LFOs.
Hope this helps.