Audio input

Hello everyone

I will soon acquire Mini2440 board and I'm currently gathering resources
and preparing toolchain. I'm mostly interested in sound processing, I would
like to build custom DSP effects with some supporting GUI made in Qt.

I noticed that the board has two audio inputs - one is connected to onboard
mic, and other is on connector CON10. I would like to connect line-in
signal to this input. Audio codec UDA1341 supports different levels of
input signals by changing PGA settings over I2S. How is this supported from
Linux? At which stage during power-on is UDA1341 configured?

Has anybody here worked with audio input? Is there a project available?

Thanks
Josip

Hi,

Did you go forward with your project ?

If yes, can you open the audio device (UDA1341) in Read/Write mode ... 

Regards

You can change parmters via IOCT. I have port fmpeg and also written an
applicaiton for auido capture but the board audi cannot be played in the
PC. The sound is so low that nobody can listen to it. I wonder if the
problem is in 16 bit PCM capture, little endian x big endian.


I´m trying to fix it but had no success.