I am using Axe I/O Solo, and Amplitube 5. I am getting subtle noise while playing / recording guitar. It isn't always present, it just pops in sporadically while playing notes (doesn't seem to pop up when not playing). It isn't easy to hear, it's subtle. It's high-pitched, in what I will call the 'fizz zone' if that helps. It's sort of a transient high-pitched 'buzz,' reminiscent of a fret buzz (except higher-pitched), but my frets aren't buzzing.
It isn't clipping (or if it is, it isn't being shown visibly), neither at the audio interface where you can see the levels, nor at the software inputs or outputs, nor at the sound card inputs/outputs.
It isn't an issue with the buffer length. I can provoke that kind of noise by setting the buffer too low, and it's a different noise. But in either case, I've eliminated that possibility by just setting the buffer as high as possible.
Here's a 1 second (or thereabouts) clip. The noise is discernible starting about midway in. Listen for a 'rattle' or 'buzz' sort of like static. It's not loud, it's superimposed on top of the chord being played.
https://sndup.net/6f49
Has anyone heard anything like this, and if so, do you know what it is, do you know how to solve the issue?