我的操作系统中的所有声卡信息：
ls /dev/snd/
by-id by-path controlC0 controlC1 controlC2 hwC0D0 hwC2D0 pcmC0D3p pcmC0D7p pcmC0D8p pcmC1D0c pcmC2D0c pcmC2D0p pcmC2D1p pcmC2D2c seq timer
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Generic_1 [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 2: Generic_1 [HD-Audio Generic], device 1: ALC662 rev3 Digital [ALC662 rev3 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
播放音乐：
mplayer sample.mp3
我想要指定硬件编号：
mplayer -ao alsa:device=hw=2.0 sample.mp3
MPlayer 1.4 (Debian), built with gcc-10 (C) 2000-2019 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing sample.mp3.
libavformat version 58.45.100 (external)
Audio only file format detected.
Load subtitles in ./
==========================================================================
Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
==========================================================================
[AO_ALSA] alsa-lib: pcm_hw.c:1715:(snd_pcm_hw_open) open '/dev/snd/pcmC2D0p' failed (-16): Device or resource busy
[AO_ALSA] Playback open error: Device or resource busy
Failed to initialize audio driver 'alsa:device=hw=2.0'
Could not open/initialize audio device -> no sound.
Audio: no sound
Video: no video
如何使用参数--调用我的音频硬件-ao alsa:device=hw=？