I 've just bought a 1810c today, to replace my focusrite 6i6.
I can't listen or record SPDIF. No sound at all.
It worked very well on the Focurite,
Here is the channel :
Guitar => Line6 Helix LT => SPDif Input of the 1810c.
I tried with clock internal and spdif; nothing work. Could you help me ?