[Elecraft] Help with digital modes please

[jim]

After being off the air for 10 years I've forgotten much. Still remember 
Morse so I'm back on CW but I want to get back into digital modes.

I just orered the Signalink USB interface and waiting for that to arrive 
in afew days with  the proper cable for my K2.

Also I'm using Linux (Ubuntu 12.04) but I'm getting help with that end. 
I've installed Fldigi for Linux.

There will be other questions no doubt but one is about Mic Gain.

 From the K2 Menu mic gain is set at ssbc 1-1 is that the correct 
setting for mic gain?

  Thanks

Jim  KJ5TF