我的电脑上有多个声音输出设备如下:
% cat /dev/sndstat Installed devices: pcm0: <Realtek ALC892 (Rear Analog 7.1/2.0)> (play/rec) default pcm1: <Realtek ALC892 (Front Analog)> (play/rec) pcm2: <Realtek ALC892 (Onboard Digital)> (play) pcm3: <Intel Kaby Lake (HDMI/DP 8ch)> (play)
第一个(pcm0
)是接的是音响,我觉得它太响就想用耳机; 耳机的是pcm1
.
切换到root用户.
# sysctl hw.snd.default_unit=1 hw.snd.default_unit: 0 -> 1