The real sound capture is done through the 'Controlle' soundcard which is also created after plugging in the EasyCAP.
To get a list of the registerd ALSA soundcards, run the following command:
cat /proc/asound/cards
Sample output:
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xf0580000 irq 44
1 [stk1160mixer ]: stk1160 - stk1160-mixer
stk1160 ac97 codec mixer control
2 [Controlle ]: USB-Audio - USB 2.0 Video Capture Controlle
Syntek Semiconductor USB 2.0 Video Capture Controlle at usb-0000:00:1d.7-1.1, h
Activate audio
To enable sound capture you have to open alsamixer when the EasyCAP is plugged in and select the 'Line' item on the capture menu for the stk1160-mixer device:1. start alsamixer
2. select stk1160-mixer sound card (with F6)
3. select capture controls (with F4)
4. select "Line" output (with space key)
You can do this on the commandline as well with this line:
amixer -c stk1160mixer sset Line unmute cap
Note! In the viewing- or capturing program you must then select the 'Controlle' soundcard or its number to hear sound!