We are talking about a VIM1S not VIM4. I was testing with an HDMI cable connected. SPDIF works but I could not get the I2S pins to Work as expected.
There is a forum post regarding this on a VIM4 but I’m not sure if it is relevant to a VIM1S. I will post a link to the VIM4 post here.
Is there an I2S output example - #2 by goenjoy