ALSA Dunno is possible capture multiples sources?

Hi there, i am trying to configure alsa to capture from single sound card to capture : Mix, Mic & Line (please none of pulseaudio)

Because i ever see i can record from one source and i just can choose one from various options available

https://i.postimg.cc/NFwxSXK8/ALSA-C...taneas-001.png

Well Suppose the follow, i want

1) Play a background music (mix)

2) Record my voice from the mic connected in the Mic Jack Port of SoundCard

3) Record the notes i press, from my midi keyboard connected in the Line Jack Port of Sound Card.

Is possible to configure alsa to make something like (this is mockup make it by myself on gimp)

https://i.postimg.cc/Twb9t03Y/ALSA-C...taneas-002.png

Enable three capture sources : Mix, Mic & Line from the same sound card and set volume for each, because one thing can be need a diferent volume to nice record.

Because i had days searching information but ever are examples or configuration for use with two or more sound cards.

like this :
http://www.jrigg.co.uk/linuxaudio/ice1712multi.html

or this another one :
https://stackoverflow.com/questions/...ime-using-alsa