Hi,

Several people (including myself) have reported a bug with the new ASUS Zenbooks (UX534/434/334) where we simply don't have any sound at all. 

Please see:

https://bugs.launchpad.net/ubuntu/+bug/1850439

This seems to be a recurring issue with ASUS Zenbooks, with a bug reported last year (which was fixed) please see - 

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1784485

hwinfo --sound gives:

19: PCI 1f.3: 0403 Audio device                                 
  [Created at pci.386]
  Unique ID: nS1_.9G5mT1GK4nF
  SysFS ID: /devices/pci0000:00/0000:00:1f.3
  SysFS BusID: 0000:00:1f.3
  Hardware Class: sound
  Model: "Intel Audio device"
  Vendor: pci 0x8086 "Intel Corporation"
  Device: pci 0x02c8 
  SubVendor: pci 0x1043 "ASUSTeK Computer Inc."
  SubDevice: pci 0x1a61 
  Driver: "snd_hda_intel"
  Driver Modules: "snd_hda_intel"
  Memory Range: 0xc4318000-0xc431bfff (rw,non-prefetchable)
  Memory Range: 0xc4100000-0xc41fffff (rw,non-prefetchable)
  IRQ: 148 (696 events)
  Module Alias: "pci:v00008086d000002C8sv00001043sd00001A61bc04sc03i80"
  Driver Info #0:
    Driver Status: snd_hda_intel is active
    Driver Activation Cmd: "modprobe snd_hda_intel"
  Driver Info #1:
    Driver Status: snd_soc_skl is active
    Driver Activation Cmd: "modprobe snd_soc_skl"
  Driver Info #2:
    Driver Status: sof_pci_dev is active
    Driver Activation Cmd: "modprobe sof_pci_dev"
  Config Status: cfg=new, avail=yes, need=no, active=unknown