@hyphop please explain how to use I2S with the TB. According to the schematic the GPIO I2S goes only to the ‘I2S Ext’ connector J9. The ‘8 Channels Ext’ connector J3 has I2S to the XMOS, but so far as I know it would need a modified firmware to make use of this in any way.
@ravelo again judging by the schematic, pins 13, 15 and 16 from VIM to TB and configure it to be SPDIF out, then coax between the RCA SPDIF connectors. Pins 15 and 16 switch the SPDIF routing, but I’m not sure how this appears on the VIM software. For whatever reason there doesn’t seem to be a way to route the SPDIF from the VIM into the DAC of the TB that’s connected to it - I guess it’s expected to use the USB connection on pins 3 & 4, but in your use case that’s no good as the clocks will drift out of sync over time. I don’t know enough about the VIM hardware to know if the I2S and SPDIF use the same clock or not - it may even depend on which end of the I2S is the clock master. Is the VIM I2S capable of TDM like the Beaglebone, or just I2S like the Raspberry Pi?