Having trouble getting my Helix Rack stereo effects in stereo in Helix Posted March 16, 2018 I use 1/4 and spdif with no stereo issues (as I'm sure everyone will say). I'm using spdif now - I took a blank preset and did nothing except put a ping pong delay in it and it's stereo. I use the Helix Editor and the input and output are multi. Have you started from scratch like this to find the issue? I also use an audio interface and once my 1/4 inputs magically went from L and R to the middle and it took me a while to think of checking that.