I'm only familiar with the chip on the T3.2. Its Synchronous Audio Interface (SAI) has two sets of I2S inputs / outputs, but they must run synchronous with each other. You should probably start with the datasheet to check and see if they both can run TDM at the same time. If so, you might be able to create an Audio Library class to use them both -- kind of like the Quad I2S class.