Hi Rita,
the definition tab is there for defining your audio.
It helps you to find out the bpm of a sample for example.
Try that: Pick a drumloop that has 4 bars. Now go to the definition
tab and type in there that is has 4 bars (underneath the info line). Now it’s tempo is automatically
detected and the sample is automatically stretched correctly when music mode is activated
for that sample. The bar on the left side and the vertical lines also helps you to make
it fit to your stuff. When you have a “tipsy” drumloop, you can define where exactly the 2 and the 4
or the 16th (and so on) are.
There’s a button next to the “edit / calculate hitpoints”. Looks like a white box with a black cursor in it.
Press it to activate it. Then move the slider above to set up the sensitivity.
Cheers.