Sound not working on Chromebook

[EzyRyder]

Hi, here's mine from Lenovo 100s chromebook:
aplay -l
**** Luettelo PLAYBACK laitteista ****
kortti 0: PCH [HDA Intel PCH], laite 3: HDMI 0 [HDMI 0]
  Alalaitteet: 1/1
  Alalaite #0: subdevice #0
kortti 0: PCH [HDA Intel PCH], laite 7: HDMI 1 [HDMI 1]
  Alalaitteet: 1/1
  Alalaite #0: subdevice #0
kortti 1: chtmax98090 [chtmax98090], laite 0: Audio (*) []
  Alalaitteet: 1/1
  Alalaite #0: subdevice #0
kortti 1: chtmax98090 [chtmax98090], laite 1: Deep-Buffer Audio (*) []
  Alalaitteet: 1/1
  Alalaite #0: subdevice #0