I've been complaining for a while about a lag in the wah. I use a Ground Control Pro (MIDI Controller) with a Mission expression pedal and it used to be that the wah (via MIDI CC) was super responsive - I never noticed it wasn't an audio wah.
I had some downtime and went through a few version upgrades... when I was back out playing again I noticed the wah had a delay... it's about an 1/8th note most of the time
At first I thought I was crazy so I let it ride. But gig after gig it kept bothering me. I sort of learned to adapt but never could figure it out.
Finally I have it - it's because I have the "WahPedal>Pitch" button set... that causes a delay in reaction.
I can see the MIDI output on my Ground Control Pro - it moves as fast as the pedal.
I can also see the MIDI input on the KPA in the system page - with "WahPedal>Pitch" unchecked, it's fast, with "WahPedal>Pitch" checked... it's got the lag.
Is this a known issue? Does anyone know a workaround of some sort? And no, plugging my control pedal directly into the KPA is not what I'm going to do. It's always the first thing that is suggested when I start threads like this.