1-st bug
I use zero attack sample for test

layer attack & decay sets to 0 (global AMP ENV is off)

but after render attack & decay non zero(attack - 5 samples, decay - 220 samples), and on playback attack sounds softer than original sample

2-nd bug
then I set decay to 20 ms and after render we see second knee on graph

and how about optional MSEG envelope for layer amplitude?
and "range" knob for offset parameter? It can be usefull precise adjustment, for example in range 0-20 ms with 0.1 ms step
