(I'm crossposting this to the relevant areas.)
Re: effect 294, set existence delay
IESDP and NI say that param 1 is undefined, and param 2 sets the delay between barks (-1 = do not play at all, 0 = "normal", 1+ = increasing time between with 1 as fastest)
These were the tests I ran for varying params on VOIWES.
p1: 0
p2: anything
result: no difference between them or with unmodded (i.e. fired very infrequently)
p1: 1
p2: 10
result: super short delay (< 0.5 second) and interrupting itself to start a new one; continuously runs
p1: 10
p2: 10
result: slightly longer delay than above (more of the bark played), but still interrupts itself; continuously runs
p1: 20
p2: 10
result: delay between barks varied anywhere from <1 second to about 6 seconds; could still interrupt and run in bursts
p1: 0
p2: 60
result: same as unmodded
p1: 1
p2: 60
result: fired immediately and started anew when completed; no interrupt
p1: 30
p2: 60
result: fired immediately, with ~1 to 3 second delay between; no interrupt
p1: 200
p2: 60
result: fired immediately, with delays between from 6 to 34 seconds
Clearly param 1 controls the range of the delay between barks, and param 2 seems to set the minimum delay amount.
For the chanters, a setting of 100 & 60 seemed to replicate BG1 behavior.