No the K3 already has transformer isolated line in and line out
connections.  These make for very simple connections to onboard sound
cards and if you need an outboard sound card with just two 3.5mm audio
ports these can be had for less than 20 bucks online.  

Keeping things in this fashion keeps the higher noise digital equipment
outside of your highly sensitive receiver.

~Brett (N7MG)

On Sat, 2010-07-10 at 14:50 +0200, Dr. Werner Furlan wrote:
> This is a question to the development team: are there any thoughts or 
> possibilities to add a USB port to the K3 or P3 which could introduce a 
> USB "soundcard" to the K3 like it is in the IC-7200 or the upcoming TS-
> 590s (?) 
> 
> 73! de Werner OE9FWV
> 


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