Linear Chaining Sequence Mode
In this mode, there would be the possibility to click inbetween two arrangements and a little 'chain' icon would appear indicating those two arrangements are now tied together in linear time. This means that when you start the first arrangement (C1) playing, it would reach the end of that arrangement and then immediately switch to the next chained arrangement (C#1) and then after finishing the second arrangement, play back would jump straight back to the first arrangement (C1).
If you wanted to extend the chain, then you would just click inbetween arrangement C#1 and D1. Thus giving you a 3-arrangement chain of "C1>C#1>D1" that cycles upon reaching D1.
As extra functions, you could have a little number appear to the above right of each arrangement which you can drag up or down to set how many measures the play back is held on that arrangement before progressing to the next chained one.
Also to consider: Different icon for different types of chaining. E.g. As well as a standard linear chain, there could be a "change direction" chain, or a "jump to.." chain.
A last thing that would be nice is to have 3 seperate cycles (one for each line of chains you have on arrangement window at the moment (C1-G1, G#1-D#2, E2-B2), these can play back in 3 (maybe expand if can increase number of arrangements in the window?) polyphonic layers. Or there is the possibilty of just using all of them in one lengthy sequence.
Because diagrams explain more than in words:

Red sequence will cycle between it's '[' ']' start/end points. Note the 2 measures for 'C#1'.
Green Sequence cycles also betwen '[' and ']', however it runs at the same time as the red sequence and will start when the host sequencer 'play' button is hit.
I am aware this would take a long time to implement so am not too concerned if it doesn't come around for a while. It could make a nice 'big feature' for a bigger release perhaps?

