Pio

Yes, AGND and GND can be connected. VGND (ground terminal of the headphone jack) and either GND or AGND must not be connected. When you install both T4.0+AudioBoard on your board, does the Teensy work fine for some time until the voltage...

use ps_malloc, it checks if the PSRAM is initialized. Also check if the returned pointer is not NULL before using it.

Not the ideal solution, but in some situations might be enough - made this some time ago and have been using for over a year now. T40 SDIO << link to github repo

To add another potential failure source of the PSRAM chips, in my case it was Lyontek bought few years ago at LCSC: if the chips were stored for a longer period of time and not backed to remove any moisture they can fail while reflowing, either...

Hey Everybody! I wanted to share my latest Teensy project, a 6-voice polyphonic virtual-analog synth built with Teensy 4.1, inspired by the iconic Minimoog Model D. It includes full subtractive synthesis, USB audio/MIDI, a menu interface and a...