Static when playing music

It could be a driver problem. You have a soundblaster card  and a via chipset. It is typically ,when mines goes funky . It is the whole system, not just one speaker.

Try turning the volume down in your player (not the computer master volume).  With some web radio players I have to turn the player's volume down or I get distortion in loud passages - it feeds the system too hot a signal.

Go to  Control Panel/ Audio Devices, or something alike,  disable everything you are not using, and save.

Sometimes it works.

I had same experience with my m50, although I use it connected straight to cowon j3. I thought it was music problem, so I even bought CDs with the songs that had statics in and compared the mp3s to lossless. It was still there. I concluded it was just badly mastered recordings... Maybe you should check. Is the static noise in high range apparent in other songs as well? Or is it just in some of the songs? This might be a good indicator as to what is the source of the problem...

Using EQ to boost frequencies can also cause this.

I had some systems with VIA and NVIDIA chipsets that would act stupid with sound, make it skip, add artifacts, have the whole system skip beats, etc. and they were AMD-based.  Since I went with Intel for CPU and chipsets I've never looked back.

Can you name some songs and the exact minute of when that happens so we can check? As Juman said, there are a lot of bad recordings, I notice it myself in metal music most of the time when the notes are very high. If that's the case it could be that the Ipod just doesn't have the same level of detail than the Fiio.