Change Mic Input to Line In

Dear Sirs

Is it possible to change the UDA1341TS circuit and I suppose the device
drive firmware, to change the mono input mic to line mono one ?

If yes, how to proceed ?

Regards

Jean Fernandes

Any developer ?

Surely there is a pin you need to switch. I only know about ALSA (a linux
sound system) that I can switch both, line and mic, as input (on/off/mix).
Also I can set the volume level there.

Please take a look in the UDA1341 data sheet and the mini2440 circuit how
it is connected to the ARM microcontroller.

Hi Sirs

On schematic, we have on audio input 1 (VIN1R, VIN1L) short circuited.
I suppose the removing the R3, I disconnect the R11/C48 used to polarize
the mic on input connector CON10.

So, the next step is to change the device drive of UDA1341. My Idea:

1. Remove R3 of mini2440 board.

2. Put a CD Player (CDP) on CON10, on following manner:
           1K2
CDP(L) ---/\/\/\----|
CDP(R) ---/\/\/\----|---- CON10(1/3)
          1K2

I need to put 2 1K2 resistor in series of each CD player outputs in order
to get a "mono" audio ouptut...and so put in CON10.

3. Provide change on kernel source, to disable the PGA 6 db gain, that I
suppose active to be used with standard mic (electrec).

4. Recompile and flashing the mini.

Where I find the source code of UA, on kernel ?