You almostly certainly have the bell piezo wired to the tip connection, but it should Infact be wired to the ring.

The latest firmware is included with the latest version of the control application.

Yes. You can always find the latest version from the downloads page.

https://www.audiofront.net/downloads.php

Im always fixing bugs, you might consider updating the firmware to see if that resolves your issue. How are your devices connected?

It supplies 3.3v.

What firmware version are you using?

Not sure. Maybe try resetting the pedal input.

It doesn't appear to be a problem with the eDRUMin. Maybe a harddrive is failing? I suggest unplugging as many things as you can and get the most simple setup working, and then build from there.

With the very limited information you have provided, it's hard to say what the problem is. What OS are you using? What application are you triggering? Does the eDRUMin control application show this same lag?

It sounds like a hardware issue, but because you were blocking the eDRUMin UI, I can't see anything. You should contact me by email, support at audiofront dot net.