I love building and prototyping new digital effects for my bass/computer rig, but I’m having some issues when connecting the OWL in my signal chain while also connected via a computer. It adds a high pitched, and somewhat variable noise/hiss. I’ve tried to isolate the issue, but have been having a bit of trouble. Is there a quick fix for this that any one knows (USB isolator perhaps)? Or is this a more complex problem that is system specific?
I have my bass running into my pedal board, going out of a DI into an apogee duet, into my computer. The signal goes into Live/Max, and then out to my amp through the Duet. I have a Push, and a Softstep also connected to the computer. I have noticed that the LEDs on the Push do change the nature of the interference.
Sure, I fully understand that. Try using a separate 9v supply for the OWL, it can help to isolate the noise.
There is otherwise a jumper hidden underneath the digital board inside the pedal which lets you disconnect USB power completely. That means the pedal _must_ be externally powered, even when USB is plugged in. Apart from that USB will still function normally.
But before you try that I would recommend you search for possible ground loops in your setup, especially if you have a USB powered audio interface.