S/PDIF out config VIM edition

I’m in trouble with tone board VIM ed because was unable to find a configuration to enable s/pdif sound out …

my Tone Board (latest fw) is attached to VIM3 computer…

~/.asoundrc

pcm.!default {
type hw
card 1
}

ctl.!default {
type hw
card 1
}

root@Khadas:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: AMLAUGESOUND [AML-AUGESOUND], device 0: SPDIF-dit-hifi-alsaPORT-spdif dit-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: AMLAUGESOUND [AML-AUGESOUND], device 1: TDM-A-dit-hifi-alsaPORT-pcm multicodec-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: AMLAUGESOUND [AML-AUGESOUND], device 2: TDM-B-dit-hifi-alsaPORT-i2s multicodec-2 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: AMLAUGESOUND [AML-AUGESOUND], device 3: TDM-C-dit-hifi multicodec-3 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Control [Khadas Tone Control], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
root@Khadas:~#

it sound amazing via rca out but nothin via coax .
anyone can help me?

thanks
Enrico

Which version ROM you installed?

@Terry please confirm and response.

Hi Gouwa ,

VIM3_Ubuntu-server-bionic_Linux-4.9_arm64_EMMC_V20190830

Just to avoid possible misunderstanding about s/pdif coax output on TB, is carried out only by aml VIM sound card when connected, the ESS dac don’t see this digital output by design right now . it is correct. ?
Or there is a way to use it with dac ess output ?

Thanks a lot.
Enrico