@milododds I am now getting decent volume both through the headphones and speaker. I wish I knew exactly what I did to fix that particular sub-issue but it's now sounding amazing. I am now learning how every control within the Matrix effects the sound. So far "Tuning" is my favorite. I still have much to learn but I don't feel lost or frustrated any longer. I hope that my post helps anyone who might be trying to use a non-compatible keyboard. Case closed.