piano roll

Hi guys , I know some of you use Ableton. I wonder if any of you know VST or M4L device that allows you to draw notes in piano roll only in selected scale. For example - Presonus Studio One have the option to select scale in piano roll and thus you can put notes only in positions which refer...

Hey guys, I've installed Reaper and I am barely familiar with it. I know how to equip my MIDI keyboard, pull up VSTs and some other basic stuff, but have tried all day to use a beat sequencer. I found one called Megababy which is already included in Reaper, but I can't load any samples into it...