by fenderplucker » Sat Apr 25, 2020 2:03 am
Hi Roger, Dave, Ian,
That works fine if you have just two pedals with the second only providing the final delay plus feedback. However, pedals like the G1 Four effectively have 4 (or 5) "pedals" in series and this delivers the wrong echo pattern even before any feedback is considered. For example, with 4 heads and delays set for an Echomatic 2 timing (100, 200, 280 and 360 mSec) the output from the first pedal is direct + 100mSec. That goes to the second pedal in the chain and that gives direct + 100 + 200 + 300 (the 300 coming from the 200 mSec delay on the 100 mSec repeat from the first pedal). By the time you get to the output from the 4th pedal you have spurious echoes at 300, 380, 660, 740 and 940 mSec, even before any feedback is applied. However, the other spurious echoes produced coincide with what would have been the first feedback set (assuming feedback from head 4) and so they fit the desired pattern OK, even though their levels will be wrong. So, if little overall feedback is applied to avoid things getting even more messy, the result probably doesn't sound too bad as Dave and Ian have found, but it is still a rather crude approximation.