I'd like to use multiple pins to connect multiple speakers to play different tones on each. Using the tone lib.

How many speakers can I plug to a teensy 3.6 that way? And on which pins? I tried to read the following https://www.pjrc.com/teensy/td_pulse.html, but it is not clear to me.

I'd need at least 6 tone() capable pins, or any other solutions not involving the tone library.