Analogue-sequencer

Hi there,

I have some questions about the AUX Events.

1. Accumulator (e.g. Velocity Accumulator)
Is this a value, that is held in one variable per Track, and to which
I can add or subtract values, and then this new value will be added to
the Velocity-Values that I set up for each step? What happens if the
accumulator reaches a value of 127 and beyond? It goes back to 0? I
guess so, and so the "offset rel" Events make sense to me. But for
what can I use the "offset abs" events?

2. Randomize Velo
Here a random value between 0 and the AUX Value is added to the
Velocity Values, right? But what happens if this is more then 127? So
e.g. the Velo is 120 and the Random Value ist 20, then would the
result be 13? For the Accumulators, it makes sense to me, but for the
Random-Aux-Events, I would prefer the Values that are "higher" than
127 to stay at 127, so 120 + 20 = 127.

3. AUX D Accumulator
Here I have an Accumulator for AUX Events? I'm not quite sure if this
is right:
I set AUX C to "offset AUX D rel" and have on step1 a value of 1.
I set AUX D to "Randomize Velo", and have all steps set to 1. 
And then with every cycle the Range of the Random Velocitys goes up by
1, because the AUX D Accumulator is counting up?

I'm just starting to explore the AUX Events, and couldn't manage to
create simple examples, that make this things really clear to me. So
please tell me if I'm right or wrong with this. Or maybe someone could
make a simple tutorial, like set AUX C to this and step 3 to this and
then happens this, bla, bla. 

Thanks in advance,
Stoffel