Problem with M5455 card

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Hi,
I hope, this is the right list to post this question.
I'm porting an Ham- Radio application  from oss to alsa.
I'm using an ASROCK motherboard with on board sound and an AMD64 dual 
core. OS is gentoo linux , kernel 2.6.18, alsa-driver 1.0.13, alsa- lib 
1.0.13.

I set the card to FLOAT_LE format.
If I read the samples with snd_pcm_readi, I get invalid values ( 10*e34 
) from time to time, although  the result code of readi does not signal 
any errors.

Is there a way to check if the read values  are valid inside the driver 
? I think, there is a problem inside the driver. Using a delta 44 
soundcard, the problem is gone.

Thanks

Volker

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