Hi dougy.
Thank you.
You are correct.
What I mean is that I wouldn't want the uC to be just a asynch to synch converter.
As I understand, a real sound card doesn't comprise an uC, as it is not necessary.
I received a nice idea from edeca.
Using a uC to program an LCD.
I'm thinking of something like this:
Block #1 Laptop Serial Port --(Serial)--> Block #2 uC --(I2C)--> Block #3 LCD
At first stage, I'll build 2nd and 3rd blocks (i.e. the images will be hard coded in the uC memory).
Later, I'll let the user to decide on the image presented via the laptop.
What do you think of it?