I feel like I am probably missing something really obvious here but can anyone shed some light on why 'side-chaining' reverb and delay blocks on their own route on a mono signal path by using the split/merge blocks seems to sound different than having the signal pass directly (serial) through the reverb and delay blocks and using their 'Mix' parameter to control the amount of reverb and delay in the signal?
When I use the side-chain method I tend to set the 'Mix' parameter on the reverb/delay blocks to 100% (wet) and use the split block to control how much of my signal passes through the reverb/delay before returning to the main signal path and ultimately back via the merge block to my main signal path and the output block (reverb/delay are the last blocks in my signal chain on the 'B' route). It would seem to me that basically these two approaches should yield essentially the same result with the main difference being that with side-chaining I am using adjusting the mix on the split block instead of using the 'Mix' parameter on the reverb/delay blocks. If the reverb/delay mix is set to roughly the same amount of reverb and delay I would think these two approaches would yield roughly the same results but they sound very different to me.