Increasing FFT_SIZE Causes Serial Timeout in Spectrogram

[MCDELTAT]

I'm curious if you could point me in the right direction on how serial timeouts are handled in Spectrogram. While reading your guide I noted that you guessed you might be able to try 512 samples in the FFT_SIZE.

Since the Teensy 3.6 has a ton more memory and CPU power over the Teensy 3.0 I thought it would be simple to change the buffer size on line 26 of toneinput.ino, but alas, it was not that easy. After doubling the size to 512, when trying to open my device in Spectrogram, it causes a serial timeout 100% of the time.

I thought this might be a mismatch of the default value in SpectrogramUI.py, so I changed that to 512 as well, but that doesn't change anything either. I can't see when the serial timeouts are determined either. Any ideas? I would love to experiment and update the guide according to my results.