This makes the voulme slide goes up and down, but sound can still be missing.
Try:
cat /proc/asound/cards
Then the result will be something like:
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at xxxxxxxxxxxx
1 [EasyALSA1 ]: easycapdc60 - easycap_alsa
easycap_alsa
Then just type (if your video is the 0 change video1 to video0):
tvtime-configure --device=/dev/video1 --mixer=/proc/asound/EasyALSA1:monitor
Then type:
tvtime -v
and when the key + and - is pressed the slide will go up and down, if still no sound is because the mixer=device:channel is for OSS, the ALSA way is device/channel but I do not know yet what is the equivalent, because the path needs / and also the separator between device and channel.