Impressive and rich sound. I'm surprised you got that much out of the T3.5. I couldn't hear obvious aliasing from the waves. I assume you don't have the MCU power to use the band-limited ones?
Are you still trying to get the audio board and Teensy connected after a year and a half?: https://forum.pjrc.com/threads/65604-Audio-Adapter-Board-for-Teensy-4-0?p=264789#post264789
Can you post a photo.
Hello can you be more specific. Is it a physical connection problem? Have you soldered the audio board to the Teensy or have you tried to just push them together? That never works and seems to be a recurring problem on...
Hello, the first decision is probably the feel and whether or not they have detents (clicks) as you rotate them. These will stay in position and not move as you adjust others, but don't feel smooth like non-detented. If...
Have a look at the TeensyThreads library and put the display update code in a thread loop. I have a synth that updates the display this way and handles Midi and complex audio without noticable delay.