I'm not sure if this is normal or not, but when I play into my echo park with two amps as the output, the sound only comes out of the louder one if I'm using a mono delay (like reverse or normal tap) but comes out of both when using a stereo delay setting like ping-pong. How can I get the sound to come out of both on all delays w/o having to purchase/build an a/b/y box?