[Elecraft] K3 and PSK

[Ron W3ZV]

Setting up my K3 for PSK31. Using PC with on board sound. (Intel 
Integrated Audio). Stereo cable from K3 to sound card.  I am looking to 
adjust  ALC for 4 bars using the line in adjustment. I find that a level 
change of one unit on K3 (i.e. 5 to 6) changes ALC from zero bars 
showing to 5 bars showing. Adjusting sound card levels move the onset 
point but doesn't change the behavior. Am I missing something or do I 
have something wrong with my setup?

Ron W3ZV