Dave Smith Instruments SYNTHESIZERS

Hello to the group. 

I'm new here and have owned a desktop Evolver since last August. 
Mine is version 3.0 

I have a M-Audio Oxygen 8 midi controller which I use with it. 
It will play notes, but it as if it can't keep up with my playing. 
Not sure if it's a tracking issue with the MAudio or the Evolver. 

I've seen it demoed with a Nord Modular 2GX and that user had no 
problem with it. So I'm wondering if it's just the controller? 

I'd really like to start playing it with a keyboard. Any thoughts? 
Any recommendations for a synth controller? 

Thanks. 

Everett Smith