It doesn't work and doesn't appear on dmesg until the module is manually inserted with

modprobe snd-azt2320

ISA cards are apparently not modprobed automatically at bootup so you'll have to use hwinfo or a similar tool to find it out (Driver Activation Cmd)

hwinfo --verbose --sound

23: ISA(PnP) 01.0: 0401 Multimedia audio controller             
  [Created at isapnp.142]
  Unique ID: R_Yp.JCbCnR0V0XF
  SysFS ID: /devices/pnp1/01:01/01:01.00
  SysFS BusID: 01:01.00
  Hardware Class: sound
  Model: "Aztech AZT1008 PnP SOUND DEVICE"
  Vendor: AZT "Aztech Systems"
  Device: eisa 0x1008 "AZT1008 PnP SOUND DEVICE"
  SubVendor: AZT "Aztech Systems"
  SubDevice: eisa 0x0500 
  Driver Info #0:
    Driver Status: snd-azt2320 is active
    Driver Activation Cmd: "modprobe snd-azt2320"
  Config Status: cfg=new, avail=yes, need=no, active=unknown

dmesg

23: ISA(PnP) 01.0: 0401 Multimedia audio controller             
  [Created at isapnp.142]
  Unique ID: R_Yp.JCbCnR0V0XF
  SysFS ID: /devices/pnp1/01:01/01:01.00
  SysFS BusID: 01:01.00
  Hardware Class: sound
  Model: "Aztech AZT1008 PnP SOUND DEVICE"
  Vendor: AZT "Aztech Systems"
  Device: eisa 0x1008 "AZT1008 PnP SOUND DEVICE"
  SubVendor: AZT "Aztech Systems"
  SubDevice: eisa 0x0500 
  Driver Info #0:
    Driver Status: snd-azt2320 is active
    Driver Activation Cmd: "modprobe snd-azt2320"
  Config Status: cfg=new, avail=yes, need=no, active=unknown