I ride a 3/32 chain ring 1/8 DA cog and a KMC 1/8 x 1/2 BMX chain. when everything was new and the chainline was mint, The thing was dead silent.

Now that my chain more than a year old (i should get a new one), the rollers all loose and my chain ring is like a ninja star. It makes a little noise on hard power up and power down.

I have nothing against 3/32 but from my experience 1/8 is solid.