[sdiy] A SID question...

[CasioRZ1 at aol.com]

Hey All,

I know that some of you have poked around w/the 6581 before, so here's a 
question for you:

It appears that even if you *don't* set the gate bit but have a waveform 
selected and data in the frequency registers, the waveform will still be 
produced at a very low level at the audio out... is this right?  Does SID 
ever totally "shut up" (besides reset and/or turning the volume all the way 
down)?

Also, (bear in mind I was an english major... be gentle)... what does "AC 
coupling" mean?  As in... "the output of SID should be AC coupled"?

TIA!

Derek