There are two counters to make cartstack building easier :
" Cart time" : represents the total duration of the cartstack as built.
"Current time" : represents the position of the current point on the cartstack.
It is possible to "navigate" through the sound by clicking anywhere in the counter.
Represents the position of the current point on the cartstack
The left arrow corresponds to the "Total Time" counter. When it is pointing downwards, the counter gives the position of play in relation to the beginning of the cartstack (time which has run). When it points upwards, the counter shows the position of play in relation to the end of the cartstack (time left).
The right arrow works in the same way and corresponds to the current counter of each cart.
