Hello all,

I'm using the ALSA API for quite some time now in my application, all worked fine until I switched to EABI kernel/compiler.

My application reads signed 16 bit frames (S16_LE) using readi call:

long FCAudio::readRecordedPCM(char * dest,int len) { .... frames = snd_pcm_readi(recHandle, dest, (len / asRec.bytesPS)); //read data hw .... .... }

This worked fine on the non EABi kernel. After I switched to the EABI enabled kernel and compiler, I heard massive 'hiss/noise' on recorded audio. I took a dump of the recorded frames, and this came out:

sample data: | ff | 58 | ff | e1 | ff | e2 | 0 | 0 | 0 | 48 | ff | e0 | ff | e3 | ff | e1 | 0 | 13 | ff | ca | ff | ae | 0 | 3 | ff | ee | ff | be|

at first this seemed like correct data to me , but on a closer look the MSB(yte) is always 0x00 or 0xff I can't figure out why this is: I'm expecting 2 bytes of sample data, and in the current case I get 1 byte of correct data, and the other byte is only used for sign indication (0x00 or 0xFF).

I can't figure out why this is, can anyone point me in the right direction? It's worth noting that arecord and aplay both work correctly, and using snd_pcm_dump(); I get settings as expedted and are correct.

Thanks in advance...

Edwin van der Horst