I just got the Rane TTM57SL and upgraded the Serato program to 1.9.2 and I noticed that whenever I hit the "ON" on the echo effect, the volume goes up slightly and it gets louder so I have to lower down the volume everytime i hit the "on" on the effect button, by the way this is on Deck 1 (echo effect) also I can't control the "wet" and "dry" levels anymore, any settings I can adjust to fix this?

-chris

NOT saying that this is your case, but I ended up reverting BACK to 1.9.1 on my TTM57 because of some off the similar issues. Seems that things didn't want to SYNC up as smoothly anymore. I did call tech support, and they tried to assist, but it was just too crazy for me to deal with. I'm waiting for 2.0 to come out and I hope it'll be more stable with my TTM57 than 1.9.2 was. For now, 1.9.1 is working FLAWLESS!
Sorry, I didnt offer any help, though. Just wanted you to know that your problems were a bit common.

try turning down your feedback parameter with your p2 knob to around 40%, and pretty sure you can control the wet/dry with the right joystick

i tried both suggestion and still didnt work, and now my delay (left joystick) dont work, i cant change the echo delay to anything over 1x echo