The text on the web page says:
It also offers a 4-channel 24bit/192kHz DAC and a 4-channel amplifier (2x30W + 2x60W).
Is there any way to access the DAC channels from I2S directly?
I note the prior post about using a USB-to-I2S card instead of the RPi - I'd effectively like to do that but multichannel.
It would be really cool if it offered a USB 4-channel directly, though I can understand that the XMOS is expensive and it would need to be an option.