Mini6410 Stereo Audio Line In

I have made a new NK.bin for WINCE which switches the audio MUX to select
LINEL and LINER.

This is working, I can inject stereo signals into the ADC.

But at the moment I have not found the pinout for audio line in on the
mini6410 board. The schematic shows the pin asssignment as X so I guess the
filters are in place but the signal path goes nowhere?

I am able to inject signal into the capacitors near the audio chip for both
left and right channels, it is working fine.

Do I need to solder a stereo lead onto my board or is there another way?

Well I managed to solder tiny leads onto the filter inputs.

As you look at the board you will see two SMT caps just above the plastic
trimmer near the headphone jack. The sides of the cpas next to the trimmer
are GND the other sides are R/L linein.

This has given me a 3.5mm stereo jack lead for the line input of my
Mini6410.

To enable linein you need to rebuild NK.bin after these steps:

[1]
uncomment this line in hwctxt.cpp

WriteCodecRegister(WM9713_RECORD_ROUTING_MUX, 0xd652);    // Record Mux
Source is LineIn, +20dB

[2]
comment this line in hwctxt.cpp

//WriteCodecRegister(WM9713_RECORD_ROUTING_MUX, 0xd640);      // Record Mux
Source is MICA, +20dB

I must say the WM9174 ADC has exceeded my expectations, I did not expect
the fidelity of the ADC to be this impressive. Very flat response to true
white noise and the preamplifier stages are almost DEAD quiet.
Imperceptible alias above fs/2.

I have taken a stereo signal into ADC at 48kHz. The interleaved stereo
buffer data is now mine to play with.