I don't know the I2S protocol all that well.

If I wanted to have an I2S input (such as the I2S microphone sold by Adafruit) and an I2S output (such as audio shield or the various I2S devices that decode I2S to analog speakers), do I need to use I2S1 (pins 7, 8, 20, 21, and 23) for say the speakers and I2S2 (pins 2, 3, 4, 5, and 33) for the microphone? Or can I just wire both to the same I2S port? I don't see things like CS or direction pins in the MCLK, LRCLK, BCLK, IN, and OUT pins, but maybe I'm not understanding things.

On a whim, I bought the I2S microphone along with 2 analog microphone electret condenser microphones while buying some surface mount capacitors/resistors for the FRDM4236 breakout boards. I know I can solder the analog microphones into the audio shield, but I was curious about how to use the I2S microphone with I2S output. At the moment, I don't really have solid plans for it.