[Elecraft] [K3] Digital "4 flicker 5" help needed

[Don Putnick]

I'm having a heck of a time fine tuning my output for digital modes. I have
my sound card set at 50% volume. A mic gain of 10 gives me "3 flicker 5". A
mic gain of 11 gives me "solid 5". Conversely if I keep the mic gain at 10
and change the sound card volume, same symptoms. Any suggestions on fine
tuning my sound card and/or K3? Thanks much and Happy Holidays!
73 Don NA6Z