Micro x - Filter key track not working

[DeadVolume]

Just bought the Micro x on monday, been having a lot of fun with it.

I just found out last night though that I can't get the filter key tracking to work at all. The amp key track IS working however.

Am I right in thinking that everything between the low and high Key note numbers should move the cutoff frequency proportional to the Int in A: value or have I missed something out here. Changing the ramp settings and playing either side of the key notes doesn't work either.

I had a sound which needed to get brighter the higher up I played it which had a low initial cutoff, the key track should have moved up with the note numbers but the sound I got just got quieter and quieter the further up I went, indicating that the filter wasn't moving at all!

Is this a problem with the firmware and if so is there an update available?