Hi Michel, Maybe you are referring to my post. I always use alsa-lib to send data to the driver, I think it is the easiest way and preferred way.

Months ago I wanted to do the same (i.e. send data to the alsa-driver without alsa-lib) but then I understood this was not the right way. I'm not saying you cannot or should not try that, but from my experience (I spent a lot of time) it's not going to work.

The problem I had was that my system did not support shared objects, nor -ldl, so I could not user the "standard" alsa-lib (which usually require pthread, dl, an *.so). Then Takashi gave me a patch for that, and now I'm an happy "static" alsa-lib user.

Maybe one of the gurus (Takashi?) will give you some tips, but I think you really need a good reason for that.

Good luck, sorry for not helping you Andrea

----- Original Message ---- From: Michel Benoit murpme@gmail.com To: ciacciax@yahoo.com; alsa-devel@alsa-project.org Sent: Wednesday, May 2, 2007 7:40:29 PM Subject: alsa driver api

Hi

Does anyone have some code examples that show how to send pcm samples directly to an alsa driver. I'm (still) having trouble building/using alsa-lib and I want to make sure that my driver works correctly. If I understand correctly it is possible to send sound samples using the alsa driver api only (no alsa-lib).

All I want to do for now is send a fixed sine wave to the driver. I saw some code snippets that seemed to do just that in a recent email on this list but it would help a lot if I could have a look at the complete application.

Thanks,

Michel

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