3.2 4.2 am demodulation audio audio teensy 4.0 cable canbus vusb shottkey custom board digital noise faust gpio ground hardware dac midi2cv hardware help header files host host cable hub i2c ilovemesodamnmuch midi mididevicei midiport music pcb ports power propshield resolved rs485 sd card sdr radio secure lockable solved ssb teensy teensy 2.0 teensy 4 teensy 4.0 teensy 4.1 teensy4.1 teensy 4.1 poe teensy 4.1 usb fail teensy no more timeout tube amps usb-host usb device usb hid usbhost usb host wire