Okey, did order some anyway for testing.
BTW!
Got it working really nice at 240mhz and an UDA1334A board (this board doesnt need the MLCK) . I also needed to change the fractional dividers in output_i2s.cpp to:
#elif F_CPU == 240000000
#define MCLK_MULT 2 //4 default in audio lib
#define MCLK_DIV 85 //85 default in audio lib
#define MCLK_SRC 0 //not defined in audio lib
as stated by neurofun in the end of this thread:
https://forum.pjrc.com/threads/4803...40MHz-and-audio-adapter-board-gt-LRCLK-jitter
I have an audio board and will test it as well in a few days.
If this works with audio board, maybe audio lib need an update on this?
I'm so happy i now can upgrade my "forever project" Elektroraum
It got 3x Teensy 3.6@240mhz running with built in dac as output, summed together and trough 6-order lowpass, Resolution is ok for me i think with 12bit, but it's so noisy.
But now i can upgrade to I2S and get much cleaner sound
Here it is (can't upload pic :/)!
https://ibb.co/zbGHT50