我正在尝试与Pulseaudio一起设置声卡配置，但是我不确定alsa的配置是如何完成的。
到目前为止，我可以使用一张卡，并按如下所示选择默认的源和接收器，直到需要将另一种流混合到我的输出中为止。
pacmd set-default-source alsa_input.platform-sound.analog-mono
pacmd set-default-sink alsa_output.platform-sound.analog-mono
现在，我将再使用一张声卡，所以播放-l给出：
**** List of PLAYBACK Hardware Devices ****
card 0: cs42888audio [cs42888-audio], device 0: HiFi cs42888-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: wm8960audio [wm8960-audio], device 1: HiFi-ASRC-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: amixaudiosai [amix-audio-sai], device 0: HiFi-AMIX-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: amixaudiosai [amix-audio-sai], device 1: HiFi-AMIX-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
arecord -l给出：
**** List of CAPTURE Hardware Devices ****
card 0: cs42888audio [cs42888-audio], device 0: HiFi cs42888-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: wm8960audio [wm8960-audio], device 1: HiFi-ASRC-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: amixaudiosai [amix-audio-sai], device 0: HiFi-AMIX-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
pactl列出短接收器
0 alsa_output.platform-sound-amix-sai.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
2 alsa_output.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
4 alsa_output.platform-sound-cs42888.analog-surround-51 module-alsa-card.c s16le 6ch 48000Hz SUSPENDED
5 my_stream module-null-sink.c s16le 2ch 48000Hz SUSPENDED
pactl列出短来源
0 alsa_output.platform-sound-amix-sai.analog-mono.monitor module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
1 alsa_input.platform-sound-amix-sai.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
3 alsa_input.platform-sound-cs42888.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
4 alsa_output.platform-sound.analog-mono.monitor module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
5 alsa_input.platform-sound.analog-mono module-alsa-card.c s16le 1ch 48000Hz SUSPENDED
7 alsa_output.platform-sound-cs42888.analog-surround-51.monitor module-alsa-card.c s16le 6ch 48000Hz SUSPENDED
8 my_stream.monitor module-null-sink.c s16le 2ch 48000Hz SUSPENDED
我想使用CS42888设备并设置如下配置：
alsa_input.platform-sound-cs42888.analog-mono (Radio)
(Rate 48000, S16_LE)
|
> alsa_input.platform-sound.analog-mono (Microphone)
| |
| > alsa_input.a2dp_source (Bluetooth Audio, if available)
| | |
| | |
| | | System sounds
| | | |
| | | >
| | | |
| | > |
| | | |
-----------switching stream--------
|
|
>
|
|
alsa_output.platform-sound-cs42888.analog-mono
(Rate 48000, S16_LE)
(profile: output:analog-mono+input:analog-mono)
换句话说，我想获得Radio输入，并能够在必要时在系统声音的基础上进行流传输。另外，我想在pulseaudio中实现这一点，因为蓝牙音频和其他内容是使用pulseaudio（module-bluez5-device）进行管理的。
我可以成功录制并播放广播输入，如下所示：
arecord -Dplug:hw:cs42888audio -f S16_LE -r 48000 test.wav
aplay -Dplug:hw:cs42888audio -f S16_LE test.wav
如何使用Pulseaudio设置这种配置？我想记录到流，然后管理流之间的切换。预先感谢。