I was just thinking about how you might scratch a sample the way you would scratch a record using Renoise? The only way I know to affect playback speed and direction is through effect commands Uxxx and Dxxx, but maybe if you attach the sample playhead value to an operand control so you could control it with midi? Is there any meta device or parameter that would give you tactile control if you assigned it to a midi controller?
The only other thing you would need to reproduce a basic turntable setup would be a crossfader that would let you link two tracks together and control their volume with one control. I’m imagining maybe a two-part meta device called crossfader track a and crossfader track B that could talk to each other and fade between three states: 100% A, 100% A + B, and 100% B.
