Hi, I'm a newbie in ALSA development. I'm trying to implement an alsa interface for the audio section of my board. I have an mpc5200 that control via i2s a pcm1774 stereo DAC and I also have an amplifier between the DAC and the speakers. At the moment I have the pcm1774 driver properly working, but I have a few ideas on how to integrate the control of the external amplifier in the alsa structure. I need to set the amplifier level with a PWM input to it.

Now I'm trying to use "non dapm" controls, adding the PWM settings into this structure...

What do you guys think about this? Am I completely wrong or could this be a good way?

Thanks a lot

Ing. Matteo Canella   Firmware Engineer   Digitek - MTA SpA   Via L. Romagnoli, 24   41033 Concordia s.S. (MO) - Italy   T. +39 0535 57732   F. +39 0535 54550   email: matteo.canella@mta.it