The newer, faster chips have in general worse performing analog sections. External DAC and ADC are becoming more necessary. I don't see those being fitted on a Teensy form factor (for space reasons, and to avoid tying up SPI buses, and to give...
Defragster's explanation is correct. If you really want to dive into the details, you'll need the IMXRT1062 reference manual. It's linked from the Teensy 4.1 product page under "Technical Information" (scroll down near the end of that very long...
https://github.com/KurtMF/ObjectFLED
This closes the issue with Audio library compatibility. Thanks to u/lpao70 for reporting the issue and validating the fix. And as always, thanks to Paul S. and u/ZachVorhies for help and insights.
Release...
Future Teensy with will USB-C. I can't discuss any other details at this time. I probably should not even write this message, but hopefully it at least answers this 1 simple question.
For the less knowledgeable folks here, could you explain the advantages of running Unix on the Teensy as opposed to other existing task management libs, or RTOS?