As far as I can tall, MEPIS is a debian variant, from memory the two packages you'll need are called libasound2-dev and x-dev respectively.
I haven't got MEPIS installed here, but try typing
I haven't got MEPIS installed here, but try typing
apt-get install libasound2-devin a console, and afterwards
apt-get install x-devthat should set you up with any packages you need, and allow you to use Max 1.12 "out-of-the-box" so to speak.