Channel limits for I2S

[Zip]

I've been reading the manual for lib_i2s and I'm kind of confused about the resource usage limits. Looking in table 4, I see that with a MCLK of 24.576 MHz and 32-bit words, the MAX IN and MAX OUT is 1. Does that mean that I can only have one input data port and one output data port? I was hoping I could use XMOS chips to build a serious multichannel interface with 24 output channels and 16 input channels. That means 12 input ports and 8 output ports.