Mind you, this works nicely: > aplay -D default:CARD=MOXF6MOXF8 test.wav So I guess I must be doing something wrong ☹ /R > -----Original Message----- > From: Robert Bielik [mailto:Robert.Bielik@xxxxxxxxx] > Sent: den 7 januari 2018 10:16 > To: alsa-user@xxxxxxxxxxxxxxxxxxxxx > Subject: Problems opening devices > > Hi all, > > I am implementing an ALSA backend for an in-house cross-platform C++ > audio framework, but I have serious problems doing ALSA. My hardware is a > Raspberry Pi 3 running Raspbian Stretch, having an I2S soundcard as the main > card. I enumerate the PCM devices with the snd_device_name_hint API, and > I can get f.i. device id's like: > > ID: null > ID: default:CARD=audioinjectorpi > ID: sysdefault:CARD=audioinjectorpi > ID: dmix:CARD=audioinjectorpi,DEV=0 > ID: dsnoop:CARD=audioinjectorpi,DEV=0 > ID: hw:CARD=audioinjectorpi,DEV=0 > ID: plughw:CARD=audioinjectorpi,DEV=0 > ID: default:CARD=MOXF6MOXF8 > ID: sysdefault:CARD=MOXF6MOXF8 > ID: front:CARD=MOXF6MOXF8,DEV=0 > ID: surround21:CARD=MOXF6MOXF8,DEV=0 > ID: surround40:CARD=MOXF6MOXF8,DEV=0 > ID: surround41:CARD=MOXF6MOXF8,DEV=0 > ID: surround50:CARD=MOXF6MOXF8,DEV=0 > ID: surround51:CARD=MOXF6MOXF8,DEV=0 > ID: surround71:CARD=MOXF6MOXF8,DEV=0 > ID: iec958:CARD=MOXF6MOXF8,DEV=0 > ID: dmix:CARD=MOXF6MOXF8,DEV=0 > ID: dsnoop:CARD=MOXF6MOXF8,DEV=0 > ID: hw:CARD=MOXF6MOXF8,DEV=0 > ID: plughw:CARD=MOXF6MOXF8,DEV=0 > > These are the results from snd_device_name_get_hint(..., "NAME") (the > audioinjectorpi is the I2S device, MOXF is an USB device) > > After this I try snd_pcm_open on the IDs, most of which I get -EBUSY. > > Why is this ? There are no other applications using the devices. F.i. I cannot > open the "default:CARD=MOXF6MOXF8" device, using that exact string as id > to snd_pcm_open, I get -EBUSY every time. > > Regards > /Robert > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
