On Wed, 1 Aug 2007, Wallace, Brooke wrote: > Ok after changing permissions on the device files I get the following: > > cat testpcm1.wav > /dev/snd/pcmC0D0p > cat: write error: File descriptor in bad state > > aplay still works... I assume that aplay sets up the device with its IOCTLs. An unsetup device may well be in a bad state. > > -Brooke > >> -----Original Message----- >> From: Wallace, Brooke >> Sent: Wednesday, August 01, 2007 3:07 PM >> To: alsa-user@xxxxxxxxxxxxxxxxxxxxx >> Subject: Sending data to alsa drivers directly >> >> >> Can someone explain to me why I cant just send data directory >> the the ALSA devices? Are they not character devices? >> >> % sudo cat testpcm1.wav > /dev/snd/pcmC0D0p >> /dev/snd/pcmC0D0p: Permission denied >> >> Aplay works fine on this file. So what is aplay doing other >> than just sending the file data to the device? >> >> Please forgive my ignorance, but I'm new to this and there is >> not a lot of intro documentation. I've seen that with simple >> char devices you can just read and write directly to the >> driver... So I'm trying to understand why this does not work >> with ALSA drivers. >> >> -Brooke > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
