No SPDIF output using usb DAC(Creative SB X-fi HD)

Hi all,

Currently usb Dac “Creative SB X-fi HD” works fine with analog output.
It is displayed as “USB Sound blaster HD” but I would like to use the internal dac in my amplifier(much newer than X-fi dac) but there is not spdif output selection and there is no sound from SPDIF also.

I have used 74324 – Creative USB Sound Blaster X-Fi HD: No sound on SPDIF output as reference but still cannot get it to work. Hope someone has similar issue and solved.

Using Volumio version 2 on Raspberry Pi 1 (Running lag but playable, have ordered Pi4)