Output (headset, speakers)
Get possible outputs:
aplay -l
Output example:
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
Subdevices: 7/7
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
Here:
- Card 0, device 0 is the analog audio (jack).
- Card 0, device 1 is the HDMI output.
Input (mic)
Get possible inputs:
arecord -l
Output example:
**** List of CAPTURE Hardware Devices ****
card 1: AK5371 [AK5371], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
Here:
- Card 1, device 0 is the USB mic.
Configure
This is a configuration file to output sounds on analog audio and record sounds on the USB mic.
In /home/pi/.asoundrc
pcm.!default {
type asym
playback.pcm {
type plug
slave.pcm "hw:0,0"
}
capture.pcm {
type plug
slave.pcm "hw:1,0"
}
}
Restart alsa with sudo /etc/init.d/alsa-utils restart.
Configure USB mic gain and sensibility or headset volume level with alsamixer command.
Test
To record a sound with the configured mic, run rec test.wav.
To list a sound with the configured output, run mplayer test.wav.
Source: Kalliope installation guide