Teensy 3.1 PWM frequency?

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I'm making a project where it's important to have relatively stable voltage instead of the usual PWM wave, and all the wonderful resources are quick to inform me that it's a simple low pass filter. The only problem with that is I've got no clue what the frequency of the Cortex PWM is! It's clear that it's modifiable reading the datasheet, but I just don't know the right keywords to find the numbers I need; all I'm finding in it are the different PWM types (edge aligned, centre aligned etc) and their registers.

On a similar note, do all the PWM ports run off the same timer? I need all 12, but can only see 8 channels for the FlexTimer.

Anyone able to lend a hand? Thanks in advance!
 
Also, if you're looking to get an analog voltage, the DAC on Teensy 3.1 is much nicer. You get an analog voltage without any PWM carrier and without the lengthy wait for a low-pass filter response. But there's only 1 DAC pin.
 
Sadly I need all 12 of the PWM pins, so can't get by with just the one. I'll be sure to post this project when it's done - it should be quite cool :)
 
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