One thing I want to add. I have built tayloe detector polyphase
network receiver before and I know,
that we need I and Q to cancel out the image. But how the heck AM and
FM is done?

I just have a glue, that the I or Q signal is mixed to a higher
frequency and detected in traditional way,
but in software. Though, is there reason to mix it to a higher
frequencyif we are doing it in software?
Ok, that was the glue about FM, but AM, I can't even have a glue...

Thanks,

Janne, OH1GTF