Can't capture from line-in on Apalis IMX8

Technical Support
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1

I’m following this tutorial to capture from line-in on my Apalis when I enter the first command I’m facing this error:

root@apalis-imx8:~# amixer set 'Capture Mux' 'LINE_IN'
amixer: Unable to find simple control 'Capture Mux',0

this is my cat /proc/asound/cards output that is not the same as tutorial said:

 0 [imxspdif       ]: imx-spdif - imx-spdif
                      imx-spdif
 1 [apalisimx8qmsgt]: apalis-imx8qm-s - apalis-imx8qm-sgtl5000
                      apalis-imx8qm-sgtl5000
 2 [imxaudiohdmitx ]: imx-audio-hdmi- - imx-audio-hdmi-tx
                      imx-audio-hdmi-tx
2

Hello It works om our side. Can you try with BSP 5.3?

root@apalis-imx8:~# amixer set ‘Capture Mux’ ‘LINE_IN’
Simple mixer control ‘Capture Mux’,0
Capabilities: enum
Items: ‘MIC_IN’ ‘LINE_IN’
Item0: ‘LINE_IN’
root@apalis-imx8:~# cat /proc/device-tree/toradex,product-id
0048
root@apalis-imx8:~# cat /etc/issue
TDX Wayland with XWayland 5.3.0-devel-20210512+build.301 (dunfell) \n \l
Apalis-iMX8_Reference-Multimedia-Image

3

@matthias.tx thanks for your response. I’ve tested it with 5.3 image and it works but it not working on 5.2 image.

4

Which image did you use?

5

I’ve tested again with 5.2 multimedia image and it’s work. In my custom image that is based on 5.2 image, problem is from amixer. I solved it with configuring audio input from alsamixer.

6

Hello farshild,

ok great that works now.

Best Regards,
Matthias Gohlke