During boot, I see these lines in my messages file: Mar 23 11:35:29 m18 pulseaudio[1109]: [(null)] oss-util.c: '/dev/dsp0' doesn't support full duplex # cat /dev/sndstat Installed devices: pcm0: <Intel Haswell (HDMI/DP 8ch)> (play) pcm1: <Realtek ALC887 (Rear Analog)> (play/rec) pcm2: <Realtek ALC887 (Front Analog)> (play/rec) default No devices installed from userspace. and # ls -al /dev/dsp* crw-rw-rw- 1 root wheel 0x92 23 марта 11:35 /dev/dsp0.0 crw-rw-rw- 1 root wheel 0x94 23 марта 11:35 /dev/dsp1.0 crw-rw-rw- 1 root wheel 0x96 23 марта 12:00 /dev/dsp2.0 Why device /dev/dsp0.0 have RW permission ?
Closing this as sound(4) no longer creates devices for individual channels.