are u complety sure that it was the kernel? (e.g. did u tried the stock rom with the an older kernel? or vice versa?)
Well, asturel, you see, Xvon has a s7-105...
That audio noise glitch was there on 2.2.2, when one tries to use a Slim based rom on the S7 classic... (for instance, Trizet's rom)
if you then change the kernel, the noise goes away...
So, it is probably something in the kernel config, I would guess, but it is not your rom's fault!
One more thing...
I've posted 2 or 3 times here asking if you are going to build a kernel for the s7_10x series, but you probably did not read the posts because you never reply....
If you want to build that kernels, me and others will be happy to help you debugging the problems...
Thank you!