The issue is that rename1 has its channel extend conditions set to D / D (or Default , Default).
That is outside the defined sample range, the extend conditions hold the channel value to a constant value (of 0 in this case).
You can see this if you zoom out on rename1 a bit.
The dashed lines stretching out on the left and right are all at value 0.
Since the lookup just creates a single sample on frame1, everywhere else its zero, due to these extend conditions.
Unfortunately the Trail CHOP is set to just capture values falling within the current timeslice window (in this case the extend region which defaults to 0).
Ways around this are:
- After rename1, append an Extend CHOP set to : Hold, Hold (This moves the dashed lines up to the first/last value, and behaves well with all CHOPs down the line).
- After the lookup, append a Shift CHOP set to: Relative to current frame
(This shifts the single value to the current frame, so it falls within the current timeslice, which the Trail CHOP will catch).
I’d recommend 1, as you’ll get better timesliced data with no chance of flipping to zero during dropped frames.
A little more info: