Link the start and end points

I want to be able to easily switch instrument sounds. Or, to easily extract instrument snippets from loops.

In short, a split functionality.

Since loops can be created at 120 bpm (and if not, forced to this interval using rubberband in Qtractor), and I can create a file containing a different sound (for example, a snare) every 2 seconds (snare 1 from 0 to 2 seconds, snare 2 from 2 to 4 seconds, etc.), if I could link the start and end of the offset, I could navigate and change instruments or loop segments very easily. If I set the offset in seconds and hover the mouse over the seconds field, it advances and retreats in exact second increments.

For example, I set the start to 0 seconds and the end to 2 seconds. If I set the start to 1 second, the end is set to 3 seconds. If I set the end to 4 seconds, the start is set to 2 seconds.

In other words, when linking, changes made to one are reflected in the other, or, put another way, I'm establishing a duration for the offset.

This allows me to precisely extract cuts from a loop, or, as I mentioned, easily create complete, customizable kits. I can quickly switch between different versions (natural, electronic, synth, urban) of the same instrument... which I've previously prepared in a single file. Each file contains several versions of an instrument (kicks.ogg, snares.ogg, claps.ogg...).

It's not the ideal solution, but it's the one I thought might be the simplest to implement.

Ideally, I would include two new options: "Splits" and "Cut Selection."

Splits: setting a number of Splits, and having the spinboxs (start, end) steps adjust to that division.

For example: 8
The steps would be:
0 = (number of frames / 8) x 0
1 = (number of frames / 8) x 1
2 = (number of frames / 8) x 2
...

Cut selection: If I select cut 7, the start and end points are automatically adjusted to cut 7.

Start = (number of frames / 8) x 7
End = (number of frames / 8) x (7+1)

That was the idea; I don't know if it's clearer now... or if it's worth it.